To rest youre ballsack on someones forehead, and at the same time constantly slap their chin with youre cock.
"let me give you the backpack"
by crafty since April 10, 2008
1 more definition
The "backpack" is a sexual act in which a male stands behind a female and reaches his arms over her shoulders inserting a finger from each hand into her vagina. After insertion the male then mounts the females back assuming a "piggy back" position. After the male is airborne he continues to "finger blast" the female. *This is usually performed while dancing*
Man! Youll never believe it. i pulled the Backpack off last night at Shortys.
by NuggFunny October 25, 2014