Somebody who acts immature, lacks in banter and is generally an embarrassment to hang around with, due to this they tend to have no friends (other than sacks), it can also be said that sacks come in packs, as sacks tend to from groups of other sacks, having photo sessions where they take endless photos of themselves, then add them to facebook, or pretending to be drunk off one beer or a sip of wine! The list of sack activities are endless.
She had one wkd and told everyone she was mortal, what a fucking sack
by YELDEP June 18, 2011
Abbreviation of 'Sack of shit'
'you utter sack'
'oi sack'

Darren: did you bring the skins?
Angus: nah I've only got minis.
Darren: you fucking sack.
by DaZApache December 12, 2011
Another, short term for the word douche bag. This can be used as an effective comeback.
Guy 1: Dude, I just got that girl's number!
Guy 2: That's my ex!
Guy 1: Well at least she's not your problem anymore.
Guy 2: Sack...
by UnicornRainbowTurd November 21, 2011
It is basicaly when someone messes up or does something stupid.
Dicky-OMG FICKY 2+2=32432
by Angieisgreat09 February 16, 2008
In Iowa this term refers to a plastic bag which you may be offered at your local gas station or grocery store. If anyone ever offers you a sack, the correct response is, "sure, I'll take as many sacks as I can get." A sack can also be used as a pair of shorts in a drunken state.
"Would you like a sack with your busch lights and magnum condoms?"

-"Sure, I'll take as many sacks as I can get."
by Colangelo May 06, 2005
Bag of marijuana. Usually preceded by a dollar ammount.
Hook it up with a 20 sack.
by skrilla February 15, 2003
A "sack" can be the little baggy you put your illegal drugs in.
I lost my "sack" after purchasing my weed ...
by RGEN or KOUKIKiD! November 11, 2010
When someone purposely hits a male in the balls (sack)
Tom:(hits jack in the balls) you just got sacked!
by Tick Tick Boom May 04, 2009

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