Top definition
The act of wrapping your legs around the top of a bathroom stall and taking a shit. When the shit falls out of your ass and into the toilet it makes an "Atomic Smash"
I'd hate to be the janitor cause I just did an atomic smash in there.
by dr alph January 26, 2011
Get the mug
Get a Atomic Smash mug for your mate Nathalie.