I'm Yosemite Sam! The meanest, toughest, rip-roaring-est, Edward Everett Horton-est hombre what ever packed a six-shooter!
~ Yosemite Sam's debut in Hare Trigger.
~ Yosemite Sam telling people to shut up
Samuel Michelangelo Rosenbaum (or better known as Yosemite Sam) is one of the main antagonists in Looney Tunes franchise, who is one of Bugs Bunny's three archenemies (with Elmer Fudd and Marvin the Martian).
He was created because creator Friz Freleng needed a tougher figure to be Bugs Bunny's enemy since he considered Elmer Fudd too soft.
Yosemite Sam is usually depicted as a human cowboy with a fiery temper and a hatred of rabbits to match. He is also very trigger-happy and will start firing his [trademark] revolvers, rifles, flintlock guns, etc. at any moment, he isn't the brightest of villains though - in fact he can probably be considered extremely stupid at times and is easily tricked into humiliating and/or painful situations. Like any good villain Yosemite Sam keeps coming back despite his continual failings but he doesn't seem to be any wiser for it, still falling for the same old tricks - of course this is a trait common to many cartoon villains, not just Yosemite Sam.
Sam has also been given names like Square-Deal Sam, Sea-goin' Sam/Sam the Pirate (his name in France instead of Yosemite Sam), Sam-Duke of Yosemite, Riff-Raff Sam, Sam Schultz, Sam Von Schmam the Hessian, Yosemite Sam of Outer Space, K'chutha Sa'am, and many other aliases.
Sam is mostly an evil, grumpy, explosive, bad-tempered and loud man. Sam quickly became just as hopeless as Elmer Fudd, though he is more dangerous and only a bit smarter than him. Sam fared no better against Bugs Bunny and was soon to become hopelessly tricked by the rabbit continually. Yosemite Sam, unlike Elmer Fudd, does not fall for the same trick twice. Sam even goes to the point to shoot "Santa" if he did not give him some presents, in the 2015 spinoff New Looney Tunes.
In Looney Tunes: Back in Action, Sam becomes a manager of his own casino and serves Mr. Chairman of the ACME Corporation (who is the main antagonist of the second film). He tries to obtain a play card and then kill D.J. and Daffy, but failed. He served as one of the five major antagonists alongside Wile E. Coyote, Marvin the Martian, Elmer Fudd, and Taz.
In Looney Tunes: Rabbits Run, Sam is the secondary antagonist, though he has more screentime than Marvin.