John: Seriously, I'm getting sick of having to look up acronyms every five minutes. Why can't people just spell out WTF they're talking about these days? shm!.
Bob: Dude use urbandictionary.com
Bob: Dude use urbandictionary.com
by TigerPawn January 03, 2014

Abbreviation for "shaking my head."
by Trblmkr January 03, 2011

Swedish house mafia, a swedish electronic house music group consisting of Axwell, Steve Angello and Sebastian Ingrosso
by Repanen January 30, 2018

Simple Harmonic Motion being definition of any object in equilibrium that moves in a sinusodal wave manner across a point of equalibrium (shown by the equation X = Xo+A*Sin(wt). Analogous to male masturbation, because of its repetitive, sinusodal wave manner of movement.
by Jeremy April 18, 2005

by JuicyCFiend January 19, 2011

by dlittle March 29, 2015

u see a plain girl walkin down the street and you KNOW you have been with better and been with worse, instead of the full words, just say SHM!!!!
by Warl0cK October 23, 2008
