1.) Drugs in general, heroine in the specific.
2.)Something that is addictive and destructive to some degree.
A: Dood stop reading penny-arcade...
B: Can't... I'm addicted to smack...
by Camper October 13, 2002
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To have sex with...
As in using the word "smack" to replace the word "fuck". Not as in the form of a punch-like hit. As in the same way "hit" is used to replace "fuck" by some.
Guy1: She is so fit...

Guy2: Yeah i'd smack that silly
by smackhead March 30, 2005
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Any manner of lowlife individual who partakes in promiscuous anal intercourse with any and all willing participants.
I dropped my car keys the other day and when I bent over to retrieve them, WHAM! this Smacks comes up and rams his dick into my ass!
by Zarr January 20, 2004
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Abbreviation of "smack-ass"

A person who is rude, obnoxious or vulgar; a jerk or asshole

Commonly used by someone to refer to a person that is telling them things they don't want to hear
Mike: Laura, why aren't the dishes done?

Laura: I'm sorry, I was busy.

Mike: I'm at work all day and when I get home the first thing I have to do is clean. Why are you never able to save me that trouble?

Laura: I do have other things to do, you know.

Mike: Like what, watch QVC, eat cookies, and sleep?

Laura: You know what, you're a real smack!

Mike: And you're a useless piece of shit! Now that we've stated the obvious, where's my dinner?
by PinkFloydManiac1973 January 02, 2012
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Abnormal, Shit talking, Crown drinking Bish!
Someone keeps talking to you and all you hear is blah blah blah.....thats a smack.
by La La Linds August 17, 2007
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