Top definition
The act of two males either:

(1) engaging in double penetration while both are pumping hard at the same time so that their balls smash against each other every thrust or
(2) masterbate while facing each other, close enough to touch tips or plop, but instead they hold their manhood upward while stroking and simultaneously thrusting forward. Causing their hanging testicles to knock together mid-stroke.
Codi: Man I couldn't get a wink of sleep last night!
Joe: Shitty, how come?
Codi: Oh Nick and Craig were smashing eggs so hard last night I thought they had a live audience in the other room...fuckin' dirty deeds bro.
by MassiveDynamic February 17, 2015
Get the mug
Get a Smashing eggs mug for your father Callisto.