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2.
An insult only to be used in extreme situations.
"What the fuck did you hit me for you cunt smack!"

"Hell no, the cunt smack wouldn't even suck my dick!"
by Joe "The Curse" Washburn October 24, 2006
 
1.
Originally the act of smacking the cunt, but more oftenly used as an insult. Comparable to other insults like dumbfuck or dumbshit. Can also be used as a noun.
You are a cuntsmack. You're fucking dumber than a cuntsmack.
by kebabsallad February 01, 2014