Top definition
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
Get the mug
Get a back boner mug for your mother-in-law Nathalie.