Thomas "Tom" Cat is a fictional character and one of the two protagonists in Metro-Goldwyn-Mayer's series of Tom and Jerry theatrical cartoon short films. Created by William Hanna and Joseph Barbera, Tom is a blue/grey anthropomorphic domestic short-haired cat who first appeared in the 1940 animated short Puss Gets the Boot Tom was originally known as "Jasper" during his debut in that short, however, beginning from his next appearance in The Midnight Snack and onward, he is known as "Tom" or "Thomas".
His full name "Tom Cat" is based on "tomcat", a phrase which refers to male cats. He is very rarely heard speaking with the exception of a few cartoons (such as Tom & Jerry Tales' League of Cats) and "Tom and Jerry: The Movie". His only notable vocal sounds outside of this are his various screams whenever he is subject to pain or panic. He is continuously after Jerry Mouse, for whom he sets traps, many of which backfire and cause damage to him rather than Jerry. Tom rarely sets out to eat Jerry, only to hurt or compete with him, going to great lengths in order to torment Jerry. However, Tom is shown to get along with Jerry at times.
Tom has changed remarkably over the years, especially after the first episodes. For example, in his debut, he was quadrupedal and had normal cat intelligence. However, over the years (since the episode Dog Trouble), he has become almost completely bipedal and has human intelligence. As a slapstick cartoon character, Tom has a superhuman level of elasticity. When acting as Jerry's antagonist, Tom is usually defeated (or very rarely, killed) in the end, although there are some stories where he outwits and defeats Jerry.