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Swack is basically another word for fuck. This word originated in San Diego, where lots of guys use it.
GUY 1: Look at that ass over there, would you SWACK?
GUY 2: I'd mos def SWACK that.
by Matt December 28, 2004
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May 14 Word of the Day
Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy
Person A: Man, that nutcase Martin Bryant guy shot 35 people in Tasmania!

Person B: No, he wasn't a nutcase, that was just a psyop so the government could have an excuse to ban guns.
by Mystikan April 11, 2006
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2
Usually means sex. Originally made in San Diego, niggas who like to use the word towards females.
Him- Yoo when we gonna swack baby ?
by SpokenThuq May 08, 2006
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3
1.) To bang the sh!t out of

2.) To copy of someone's swag
1.) Imma swack you all night, baby.

2.) Bobby likes to swack on Jay pretty much every day of his life. He even has the same shoes and repeats the same jokes to girls when he's drunk.
by $moak$takk November 11, 2011
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5
To drain a jumpshot in basketball, especially one from behind the three-point arc.
If it wasn't for Jimmer's swackin threes all night, BYU would have been blown out in the first half.
by Da_REAL_21 April 02, 2011
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