Junk-Trunk Gap Share definition Flag 1. Male Taint 2. The region between the Penis and Balls (Junk), and the butthole(Trunk) 1. Junk-trunk gap give it a slap. 2. He enjoyed a visit to the junk-trunk gap during orgasm. Junk-Trunk Gap by One nice bun August 2, 2009 0 0 Get merch Get the Junk-Trunk Gap mug. Buy Now — $32.95 See more merch