Meathead is a Tom and Jerry character.
He is a brown, mangy cat who wears a red toupee (which is occasionally seen the same color as the rest of his fur). He is generally portrayed as dull-witted and first appeared in the 1943 short, "Sufferin' Cats!", as Tom's rival. Meathead later reappeared in "Baby Puss" and additional shorts as one of Tom's alley cat buddies/foes. In Scat Cats, he is seen as a gray cat.
Fans have occasionally confused Meathead with Lightning, though the two are not the same and have appeared side-by-side in two cartoons.