Wimp/wɪmp/ Definition 1 of 3Pro Tip 1/3Often Negative Used to criticize or ridicule someone for not meeting expectations of strength or bravery. He was called a wimp for not joining the tough mudder race. Pro Tip 2/3Informal Insult It's informal and can be offensive. Be careful using it with others. My brother got mad when I jokingly called him a wimp. Pro Tip 3/3Usually Personal Refers to someone's character or behavior, not physical appearance. Despite his size, no one thought of him as a wimp.