A very dumb and spontaneous exclamation clarifying the time, usually occurs when good slang is on the tip of one's toungue but cannot be thought of correctly.
Jake: "Well, it's 3:30 on the smack..."
Gabe: "you mean to tell me?"
by PJake January 5, 2004
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1) The sound a thumper makes when it busts off

2) A common adlib used by certain rappers from North Oakland (Lil Rue, HD, etc..)
"Every day it's like I got some new niggas to kill (SMACK SMACK)" - HD on Minister Of Defense / Extortion Muzik 2
by yay area representative March 31, 2011
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The more updates name for "sandles" or " flip-flop".
Derrived from the sound the "shoe" makes when hitting your foot.
by Cher-in-Surrey November 2, 2010
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Heroin. Most frequently used in the 60s.
When the smack begins to flow, I really don't care anymore...
by Lurhstaap December 29, 2004
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To have sex from the back, hit it from behind, doggystyle. Doing this hard and fast so that it makes a smacking noise.
That girls hot, I want to smack that.
by jennw January 13, 2007
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usually used while eating some good ass food
by k money bitch June 13, 2017
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