This has probably already been a thread but it’s not an active on so here goes
These are called Mondgreens
http://www.corsinet.com/braincandy/wrlyric.html
But it’s fun to see what everyone’s favorite is
in Summer Breeze, I heard
“and you’re waiting there, not a care in the world”
as
“and you’re waiting there, how can I go on?”
Yes, we’ve done this before, but it’s always fun.
My favorite, which I misheard for at least a decade, was the Beatles’ song, Take the Back Right Turn. (Real title: Paperback Writer)
How about Huey Lewis and the News singing The Hall of Rock and Roll is in Cleveland?
same song:
Now the Oboe may be very beady
There’s a Pogues song called “The Broad, Majestic Shannon,” which describes an idyllic morning on the banks of a river thusly:
So I walked as day was dawning
Where small birds sang and leaves were falling
Where we once watched the row boats landing
By the broad majestic Shannon
Problem is, Shane MacGowan’s brogue is so thick, that when he says “row boats,” I always hear, “robots.” Which would be pretty freakin’ awesome, if you think about it.
One of my favourite misinterpretations is RHCP’s Under The Bridge (as told by a friend): Sometimes i feel like I don’t have appartment.
For me The Cars “The Dangerous Type” will always be “The Dangerous Dyke” which is the way I first heard it.
and the Dire Straits “Walk of Life” will always be the “Walk on By”
Ciara’s One Two Step really says:
So retarded,
top chartered,
ever since the day I started
Strut my stuff
and yes I flaunt it
But I hear:
…
Strut my stuff
and yes I farted
I’m with Qadgop. Seen this before, but it’s always fun.
I’m particularly fond of a new one I just saw on the site you linked to. From now on, whenever I hear the Beach Boys sing “Help Me Rhonda,” I’ll be singing along with
Oh, you wound me, sir!
(It’s fortunate that you also know how to debride and close the wound.)
My two new favorites are both from Interpol’s “A Time to Be So Small” -
Real: “Rehearsing interaction”
Heard: “Nursing an erection”
Real: “The boat will not stop moving/if you tie him up until the end”
Heard: “The Pope will not stop moving/if you tie him up until the end”
A couple weeks back I had “Bad Moon Rising” stuck in my head.
And I could only remember the chorus…and only part of it. Everyone knows what I’m talking about here.
Heh. Amazing what vanity searches bring up, no? 
I think it’s from Metallica’s “Enter Sandman”. I think the line is “Enter Light, into night”, or something like that.
I hear “Engine Light, ain’t quite right”.
The family and I were out karaoke-ing a few weeks ago. One of the singers was doing Vanessa Williams’s Colors of the Wind, and the track was probably from one of the second-tier producers:
For whether we are white or copper-skinned
became
Or whether we all like our copper skin.
Elton John’s “Philadelphia Freedom”:
Real: “Gave me peace of mind my daddy never had”
Unreal: “Gave me piece of mama daddy never had.”
Jimi Hendrix- Purple Haze:
“…'cuse me, while I kiss this guy”
Should read “…kiss the sky”
And another we all should know is
You, and me, and Leslie (you and me endlessly)
In the RHPS, “I’m Going Home” Frank sings “like I’m outside in the rain” - But here, 30 years later, it still sounds like “like a Matzah in the rain”
Who knew Tim Curry is jewish?
“Reverend Blue Jeans”
R.E.M.'s “Losing My Religion”
Actual: “That’s me in the corner, That’s me in the spotlight.”
Heard: “Let’s pee in the corner. Let’s pee in the spotlight.”