Semibent Share definition Flag Bisexual. Bent = Gay = Not straight Semi = Half Semibent = Half gay = Bisexual I'm glad he's semibent, or else I wouldn't even have a chance with him! Semibent by Xandeth October 18, 2009 0 0 Get merch Get the Semibent mug. Buy Now — $32.95 See more merch