monks trunks Share definition Flag monks trunks is were the dry semen or jizz on your underware makes the fabric stiff creating a mould of your body brent had monks trunks so his boxers made the shape of his bum monks trunks by brentage 1995 May 30, 2010 0 0 Get merch Get the monks trunks mug. Buy Now — $32.95 See more merch