caked up adjective4 •(slang) Having well-developed gluteal (“cake”) muscles.I got caked up doing hip thrusts. •(slang) Having large buttocks. •(slang) Wealthy.Money on my mind, good time to get caked up — 2012 •(slang) Having a disproportionate amount of a substance, such as makeup, applied upon it.She had a caked-up face after applying all layers of the blusher. formsmore caked up · more caked-up · most caked up · most caked-up