A dance in which you select a target, then dry hump them while smacking them violently with whatever appendage seems appropriate, at whatever degree you wish. A violent, and completely platonic dance.
Michelle is so bomb, I hump-smacked her last night.
Sam is a hump-smack CHAMP.
Megan? Shit dawg, Megan is like, the humpity-humpiest hump-smack dance devil aliveee.
Sam is a hump-smack CHAMP.
Megan? Shit dawg, Megan is like, the humpity-humpiest hump-smack dance devil aliveee.
by TheLovelySwampMonster March 30, 2010

by xXturndaxgurlXx June 5, 2010

by Jimmy January 23, 2003

by Delfino [YnR] January 19, 2008

Phrase invented by filmmaker Dan Mace. First featured on Casey Neistat's 368 vlog before Dan made a video about the phrase on his Youtube Channel.
by Yourrealname121 January 15, 2019

When you know and or meet someone for the first time and they dont vibe right and you get the feeling to want to smack they face off
Boy: Yo my nigga you got that smack factor son
Best Friend: The f**k is a smack factor
Boy: when you see someone or you meet someone for the first time and they dont vibe right and you just wanna smack the shit outta them
Best Friend: so you saying you wanna smack me?
Boy: Na homie but your moms on the other hand lol
Best Friend: The f**k is a smack factor
Boy: when you see someone or you meet someone for the first time and they dont vibe right and you just wanna smack the shit outta them
Best Friend: so you saying you wanna smack me?
Boy: Na homie but your moms on the other hand lol
by Krazzey8s October 7, 2011
