No cap Share definition Flag An old word from the early 1900’s that is being reused today that means, “no lie”. Man 1: I need a line up no cap.Man 2: Facts, you ain’t lying! No cap by ♪ SethSliders ♪ June 25, 2019 0 0 Get merch Get the No cap mug. Buy Now — $32.95 See more merch