Chump/tʃʌmp/ Definition 1 of 2Pro Tip 1/3Negative Connotation Chump implies a negative judgment about someone's intelligence or wisdom. Don't be a chump, do your homework before investing. Pro Tip 2/3Informal Usage Chump is not formal or polite, often used among friends or in casual conversations. I felt like a chump after I tripped in the cafeteria. Pro Tip 3/3Not a Compliment Calling someone a chump is usually offensive and could hurt their feelings. She called her brother a chump when he lost his keys again.