Top Definition
a person who, while being clearly ignorant in every sense of the word, is bestowed with financial, romantic, and professional success; not to be confused with people who have strong skills outside traditional mesaures of intelligence or practice clueless behavior to disarm their opponents--a luck-up is truly dim and impossibly lucky
Tom: Man, did you hear about Harry?
Dick: Don't tell me--he's quit his job to start making kitty condos--and is wife left him?
Tom: No, he sold his Crusty Crab franchise for $50 million.
Dick: Another $50-ball? That guy is amazing.
Tom: Yeah, and he traded up the wife for a 25 year-old physical therapist!
Dick: That guy is one major luck-up
by Semantricks August 06, 2009

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