J. Wellington Wimpy, or just Wimpy, is one of the characters in the long-running comic strip, Popeye, (originally Thimble Theatre), and in the Popeye cartoons based upon the strip. Wimpy is Popeye's friend. In the cartoons he mainly plays the role of the "straight man" to Popeye's outbursts and wild antics. Wimpy is very intelligent, and well educated, but very lazy and gluttonous. Wimpy is also something of a scam artist and (especially in the newspaper comics) can be notoriously underhanded at times. Wimpy loves to eat hamburgers, and is usually seen with one but is usually too cheap to pay for them. A recurring joke is Wimpy's attempts to con other patrons of the diner into buying him his lunch. Wimpy often tries to outwit fellow patrons with his convoluted logic. His famous line, which was first introduced to the cartoons in 1934's We Aim to Please, is "I'd gladly pay you Tuesday for a hamburger today".

He appears as a fellow stroke victim with Peter in "McStroke", but he still can't resist using his catch phrase.