Trouser boner Share definition Flag When ones pants/trousers forms a slight rise in the genital area implying that you have an erection when you really don't That was so embarrassing - everyone thought I had a boner! Although it was just a trouser boner. Trouser boner by Rowensg June 9, 2014 0 0 Get merch Get the Trouser boner mug. Buy Now — $32.95 See more merch