Bimini Share definition Flag A girl who's simply a blast! A bimini is funny and nice, the opposite of selfish and arrogant and always there or everybody. Someone who makes people feel good around them. Oh, she's such a bimini! Bimini by Ughalala July 7, 2009 0 0 Get merch Get the Bimini mug. Buy Now — $32.95 See more merch