Batman, of course, has "the Bat Pole..."

Spiderman is just one big metaphor for male puberty. You wake up one morning, suddenly you have new muscles, hair growing where it didn’t before, the ability to shoot sticky white goo around the room, man it’s obvious.

Mr. Furious has his red hot rage.

Roland of Gilead and Eddie Dean both have guns so big they have to tie it to their leg.

And the Blue Rajah is known to give a good forking.

Wonder Woman must think she’s made outta gold and enjoy anal, because she’s got her Golden Lasso.

Hourman…invented Viagra. (Inside joke)

Captain Caveman has his stalagmite. Or is it a stalagtite?

Iceman has his icycle.

Doctor Octopus has his giant squid.

Professor Xavier has his little bald guy.

The Juggernaut has his ass-tronaut.

The Tick has his Spoon!

Dr. Detroit has his girls
Frodo has his Bag End
Arthur Dent has his Babel Fish
Mickey Mouse has his Minnie
The Colonel has his chicken
Beastmaster has his gerbils
Luke Skywalker has his saber
Capiain Nemo has his sea men.
Captain Ahab has his white whale.
Gandalf has his staff
The Mule has his nose
Harry Potter has his wand
Kaiser Wilhelm has the funny spike on his hat
Odo has whatever he wants
Flesh Gordon has his penis

Captain Marvel had, appropriately, another Captain Marvel (this one raises weird questions about his sister, Captain Marvel)

Lee Adama has his Viper,
While Bill has his Battlestar.

Ash (housewares) has his Boomstick.

Gandalf has his staff.

I’m not sure what Rorschach has. What do you say it looks like?

Rorschach’s is never the same twice (but it’s almost always perfectly symmetrical)

Annihilus has his Cosmic Control Rod.

Daredevil has his baton.

I know this much: Dollar Bill got his caught in a revolving door.

Etrigan has his Demon.

Darth Vader has his force
Han Solo has his millenium falcon.
Chewbacca has his ewock.
Yoda his thing does have, yes indeed

AFAIAC, this wins the internet.

snort

Cthulhu has a deep one.

Gordon Freeman has his Crowbar.

With Underdog, it’s not so much what, but where, it’s ah…under dog.

Doc Savage isn’t into cutesy nicknames. He calls it what it is: 18 inches of bronze bar stock.

The Multiple Man has his Multi-Tool.

The Atom has a hadron.

Bizarro have paper. Paper beat rock.