It's when a girl deepthroats ALL the way and her lips touch the scrotum(ballsack)
Ingrid: "Did you get head from that girl at the party last night"?
Opie: "Yeah".
Ingrid: "How was it"?
Opie: "She went all the way down to the sack"!
by TheSackMan July 8, 2010
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this verb means to dump someone's bookbag out clean.
guy 1 "Hey, Jim left! sack him."

guy 2 (so guy 2 dumps everything out of Jim's bag)
by funnyman21224 July 31, 2010
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I will hack off Trump's head and carry it around in my sack.
by The Best UD User January 22, 2017
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testicles, balls, or nuts (pl.)
Mom, dad was looking at sacks on the computer!
by jawsh March 3, 2004
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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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