Who is the Marvel superhero known as the 'Merc with a Mouth'?

The Marvel superhero known as the “Merc with a Mouth” is Deadpool. The nickname refers to Wade Wilson’s constant wisecracks, irreverent humor, and tendency to talk through even the most dangerous fights.

Deadpool was created by writer Fabian Nicieza and artist Rob Liefeld and first appeared in The New Mutants #98 in 1991. He began as a highly skilled, heavily armed mercenary whose design and behavior were influenced by other popular comic-book characters, especially DC’s Deathstroke. Deadpool’s creators later developed him into a more distinct antihero with a darkly comic personality.

In most major versions, Wade Wilson undergoes an experimental treatment that gives him an accelerated healing factor. The process saves his life but leaves him severely scarred. His healing makes him extremely difficult to kill, while his expertise with swords, guns, and hand-to-hand combat makes him a formidable fighter.

Deadpool is not simply another name for Wolverine, although the two have crossed paths and share a healing ability. The Punisher is also a lethal antihero, but he has no connection to Deadpool’s “Merc with a Mouth” title.