look up any word, like swag:
 
1.
when a band or artist gets really popular, and everyone in the scene starts to hate them.
i used to like Killswitch Engage, but now that they're big. i think they suck.
by v1cious July 19, 2004
 
2.
When you cum so hard you go flying backwards
Dude...did you hear about Jim? He was banging some chick and when he came he backlashed and fell out the house.
by BobFTW October 04, 2009
 
3.
when you are about to nut and a girl is riding you, then all of a sudden she gets up and your penis flings back at you at the exact moment you blow your load, resulting in a backlash of nut on you.
Damn man last night i was bangin your mom and then right when i blew my load she got up and i got backlashed
by Kelmet February 08, 2006