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

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

Early 17th century. From Latin, smackus de roois. Theory of origin: from the time of Seneca; first noted use in Letters from a Stoic. From the verb, "smacka-da-roo," signifying a real up-and-comer, go-getter, straight-shooter, and other hyphenated synonyms. One who "smacks the roo," from Augustus Caesar on to Joan of Arc and to present-day Margaret Thatcher, is not afraid to take charge of any given situation, to be the captain of their soul, the master of their fate. Made popular by "Invictus," Wiliam Ernest Henley. Also made popular by certain intrepid Australians smacking kangaroos, but let's not get into that...
Babushka: Did you see how MC pretty pants got that promotion at AWS through sheer hard work and effort?
Macushla: Yeah, she's pretty awesome. She's been known to smack the roo from time to time, but she must've really smacked the roo in that last quarter.
Macushla: Yeah, she's pretty awesome. She's been known to smack the roo from time to time, but she must've really smacked the roo in that last quarter.
by Babushk September 19, 2019
