back boner

the term used for describing the suprising presence of an erect penis against ones lower back.

Ian surprised Susie in the post office queue by giving her a back boner.
"Do you need a Jiffy bag for that or shall we send it guaranteed delivery?"

by Shakedown August 31, 2007

Back Boner

When your spine gets stuff and hurts

Man I ran so hard today I got a Back boner
Well there’s no lube to ease that Back Boner

by Fudgedragon2005 January 16, 2019