At the end of the movie where Jack Sparrow is on the Black Pearl steering the wheel and looking at his compass he’s humming then he says
**"…and really bad eggs." **
Is there any explanation for it? Or is he saying something else and I misunderstood?
He’s humming the song “Yo ho, yo ho, a pirate’s life for me!” from the original Pirates of the Caribbean ride at Walt Disney World, and that is the only audible line.
But what is the significance of “…and really bad eggs.” in the context of the original words to the song. I think that’s what the OP is asking.
From this, it appears to be:
Apparently it’s part of the pirate song from the Disney ride.
The full lyrics of the stanza are:
" We’re rascals, scoundrels, villains and knaves.
Drink up me 'earties, Yo Ho!
We’re devils and black sheep, really bad eggs!
Drink up me 'earties, Yo Ho!"
It’s just another way of referring to pirates as bad guys. You’ve never heard “bad egg” used to refer to someone who was morally or ethically rotten?
It’s also what he and Elizabeth are singing when they are dancing around the fire on the island – Jack drunk with rum and Elizabeth pretending. After singing the end of a stanza, Jack yells out “And really bad eggs! I love this song!”
The young Elizabeth also sings the song at the very beginning of the film while standing on the prow of the ship. She is warned by Mr. Gibbs not to sing about pirates in “these waters”. So if it’s a known pirate song, why doesn’t Jack know it already?
A) He was drunk
B) He was insane.
Let’s not forget those two factors.
Nothing says he doesn’t. The only line that implies someone doesn’t know it is when he says “I’m going to teach it to the whole crew!”
Failing that, it might be, in the PotC-verse, a children’s song from England that hadn’t found its way to the Caribbean until Elizabeth and her father went to Port Royal. In fact, if I remember one of the commentaries correctly (probably the scriptwriters’), they mentioned they wanted to use the song, but in the world they were creating it didn’t seem appropriate for their pirates to sing it as a bona fide pirate song. So they made it seem like a children’s song by having young Elizabeth introduce it. Note that Jack is drunk as a skunk when he gushes about how much he loves it; likely most pirates wouldn’t admit to knowing it.
I never really liked how they use the song in the movie. The humming never quite syncs up with the actual tune in my ears, and just coming out with “and really bad eggs” without the song’s cadence just sounds odd.
Is it bad that I remembered all that off the top of my head? I haven’t watched the movie in weeks, either.
Yes, and I think that his singing it with her is what is signifigant(if anything) about the line. It hints at a chance for a sequel since he is thinking about the adventures with Elizabeth and Will with fondness.
It may be a known pirate song back in England where pirates are largely romanticized (much as they are in Disneyland), but unknown to the actual pirates themselves.
Or Jack just hadn’t known that particular song. Not exactly shocking.
Further discussion on who knows the song:
So Jack says he’s going to teach it to his crew. Which includes Mr. Gibbs, who was the one who shushed young Elizabeth about singing it at the beginning. So definitely unclear as to who knows who knows about the song. Clear enough?
(I have wondered what Mr. Gibbs’ story was. He was a sailor on a British Navy ship in the beginning. But a drunken pirate later. He also knows Jack very well, including what Jack was like before the mutiny, which of course took place before the opening scene.)
I just have to wonder how Mr. Cotton’s going to sing it.
well the parrot would have to pick up the slack, now wouldnt he? 
Are you sure the mutiny took place before the opening scene? I know the pirates were cursed for ten years, but maybe Jack was still in command of the Black Pearl when it waylaid the ship in the opening. It appears that right around ten years passes between the opening scene and the events in the movie.
Granted, Mr. Gibbs’ fall from grace would have to have been catastrophic for him to have been drummed out of the Royal Navy (presumably for drinking), fallen in with pirates, and gotten to know Captain Jack Sparrow pretty well. Those events would have been compressed into a matter of months or even weeks for the timeline to work. But I guess it would still be possible.
Or maybe Gibbs was just relaying gossip he’d heard about Jack when he was telling Will how the mutiny changed him. I dunno.
According to the later exposition from Pintel and Ragetti, we can be sure of it.
Timeline:
Jack somehow finds the location of Isla de Muerta.
Barbossa gets him to divulge the location. The mutiny happens and Jack is stranded.
Barbossa’s crew, including Bootstrap Bill, get the treasure and the curse.
Bootstrap becomes increasingly resentful of Barbossa’s treachery, and he sends his gold coin to Will as a medallion before Barbossa throws him overboard.
The opening scene is the aftermath of the pirates attacking Will’s ship in search of his gold coin, but by luck and movie contrivance he escapes unharmed.
As for how Gibbs seems to know Jack from before the mutiny, got me. Maybe he was stationed in the Caribbean as part of the Navy and made regular trips between it and England, and met Jack before the trip that brought the Swanns to Port Royal. Despite being one of my favorite movies, I’ll acknowledge it does have some vagueness and inconsistencies to it. 
Cool. Thanks, BayleDomon!
The chance encounter with the Black Pearl at the beginning of the film must be well after the mutiny, considering the chain of events:
[ul][li]BP crew get Aztec treasure.[/li][li]Treasure is distributed.[/li][li]As Jack tries to take his share, Barbossa mutinies with the support of (most of) the crew[/li][li]Jack marooned on rumrunner’s island[/li][li]Nature of curse revealed[/li][li]Bootstrap Bill complains at length about mutiny, sends gold piece to his young son in England[/li][li]Crew tosses Bill overboard (evidently Bill learned how to lift the curse before the other pirates did, else he wouldn’t have sent the medallion away and they wouldn’t have dropped him in the ocean. Possibly he left a note explaining the cure for the curse and what he’d done with the medallion, which was found only after he’d been invited to leave. That’s what you call ‘irony’.)[/li][li]Gold piece reaches young Will (several months, minimum) and he manages to get passage to the Carribean (several months, minimum)[/li][li]Will’s ship is attacked by the Black Pearl[/li][li]Will is rescued and the medallion is taken by Elizabeth[/ul][/li]
It simply might not be possible to resolve a tidy timeline out of the events seen and described in the film.
I’ve always had this image of a never-dying Bootstrap Bill tied to a cannon at the bottom of the ocean. Leads to much morbid thinking once the curse is lifted …