It's not a smack, it's not a punch, it's fucking spack.
That ending legit spacked me in the gut. Like it was too hard for a smack, not hard enough for a punch. It was...well...a fucking god damned spack!
by ~KillJoy~ September 5, 2015
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Another word for someone who has mental dissablities, commonly used when in presence of somebody who has down syndrome and or when your friend has done something to your displeasure.

Related to the word "Spastic"
Hahaha, look at that spack over there

What the fuck are you doing bro? Are you a spack?
by WeedLordBonerHitler420 November 4, 2018
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Another word for the sticky mess left after cumming, specifically refering to the semen, especially during a jerk off session.
Brian's spack was glazed all over the pillow once he came.
by marathon September 12, 2006
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SPonge attACKED. To be viciously attacked with a common household sponge.
I spacked felix last night, now he's in a coma.
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the original definition of this word, brought forth by Mr. North back in 1988.

A non-specific insult used as an inside joke among friends to describe anyone that happens top be in your crosshairs at that moment in time.
Mr. North: "Shut the fuck up, Jerome, you're nothing but a spack."...Jerome: "What's a spack?"...Bystander hip to the joke: Trust me man, you don't wanna know."
by Mr. North March 21, 2009
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It's a verb meaning to go all spazzy, often when seeing an image which strobes.
Your animated fractical made me spack!
by Jack Anory January 25, 2005
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The combination of "pack" and "smack"
Random kid on the internet: "Man i'm so good at this game"
Other kid: "Man, i'll spack ur ass"
by WeirdGumChewer September 22, 2019
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