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
1. The area which holds the male testis
2. Shortened work for 'Ballsack'
3. Used to improvise for a word that you would not like to say outloud.
1. ''There are two balls in my sack''
2. ''My sack is large''
3. ''Sack to that''
by Darrenliiike October 08, 2007
someone who is acting either foolish, and or naughty
he's such a sack! or used long and drawn out in disbelief... such as : saaack!
by eric hoek October 10, 2005
sometimes big, sometimes small...but really squishy feeling...feels kinda neat if you ask me hehe. before the butthole..and kind of under the weiner...very sensitive.
Sometimes pornstars get their nutSACKS cut off so they look like fricken terds.

Laug has a very small sack and it embarrasses him in certain situations.
by MYA and CMB May 09, 2006
1.brown hessian bags
2.the bags that holds your balls
3.the things bums use to carry their shit around.
1.move those sacks or I'll shove them up you arse!!!
2.don't you dare touch my sack!
3.move your fucking sacks you lazy bum!
by Jimmy Smith March 18, 2005
A person who is a really annoying muppet.
Mo is an awful fucking sack
by goGoDancingBunny February 16, 2004
An expletive used to exclaim great unlucky circumstances.
1. "Sack! I stubbed my toe!" or
2. "Oh Sack, my mother-in-law's STILL alive!"
by ChiChiLeBlanc January 29, 2010
VT. to expose one's sack to someone else, on purpose or by accident. Usually happens when a man is wearing shorts and his legs are spread, causing the sack to peep out the leg of the shorts.
"Hey, man, close your legs. You're sackin' me!"

"That guy must be freeballin' he just sacked me."
by fruity booty October 22, 2007

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