A sack is a high school prank. This is how its done.

Step 1: Grab someones bookbag.
Step 2: Empty out the bookbag.
Step 3: Turn the bookbag inside out.
Step 4: Put the books back in.
Step 5: Zip up the bag, and have the metal zipper holding things on the inside of the bag
Guy: haha, that kid just got sacked.

Guy 2: owned
by Ernesto 4 April 3, 2008
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One of the greatest past-times of all time. Also known as hacky sack. Probably invented by a bunch of stoners or perverts that thought it would be funny if they invented a game where you smack a sack around.
stoner 1: Hey man let's go play with your sack
stoner 2: Alright
by sinbad master October 16, 2005
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The act of being incredibly lazy, as in lying around like a sack of potatoes. One who sacks is often seen lounging on their couch all day playing video games and watching movies.
Jim: "Yo have you seen Alec today?"
Mike: "Not yet. Did you check his apartment? Bet you he's sacking on the couch."
by BroBro23 February 27, 2018
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a dare for someone to do something reckless and seeing if they have the balls to do it
no sack
by big poppa 302232 June 30, 2010
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Shitty
Autistic
Crappy
Kids
(Not to be confused with autistic/mentally retarded people, only jerks)
"Hey, stop harassing him you Sack!"
"WTF? What is a Sack?"
"You and your mom, bitch!"
by GhøstByte86 December 2, 2019
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sacking is a NZ slang for pussy, scared or trying to run from a fight.
eg: person 1: fuck you wanna fight bro. person 2: nah im algood later bro.
audience: fucking sacking it.
by pissyboytickenontheocean December 15, 2017
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Getting fired from your job
You're too late for work I'm giving you the sack
by Templar314 December 17, 2016
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