Getting fired from your job. Australians use this phrase a lot. Probably from the pioneer days when the boss would throw a bag at the farmhand/miner/builder/labourer's head, tell him to pack his stuff and get lost.
"Bloody hell, the boss gave me the sack!"
"Are you going to get the sack for skipping work yesterday?"
"Are you going to get the sack for skipping work yesterday?"
by oneof20million June 10, 2009
Get the get the sackmug. by TTENNEB EKIM September 27, 2005
Get the tacky sackmug. When you have balls the size of church bells to post something on Facebook that will literally piss off 8 out of 10 of your friends such that most of them unfriend you as a result.
Mich: OMG did you see Phil's post on Facebook? He literally said no wonder we are a country full of P's responding to all the democrats crying that Hillary lost to Trump. Now that's FB sack!
Pills: STD standard
Pills: STD standard
by 1337c0d3d00d November 11, 2016
Get the FB sackmug. Stuffing your balls inside a vaginal cavity like packing a pipe with your thumb while jerking off onto declared body part such as stomach or back (if flexible). Also called "sack n whack".
by deadly muffin November 16, 2010
Get the Sack and Whackmug. by Stan "the sweet stink" D... June 20, 2011
Get the Skunk sackmug. 
A sack full of the harshest insultes know to the modern man
-to be a literal leg
-a replacement swear word in case you're in a dangerous area
-to be a literal leg
-a replacement swear word in case you're in a dangerous area
"Dude did you see the teacher today? He was being the biggest leg sack"
"I wanted to go out tonight, but my mom was being too much of a leg"
"I wanted to go out tonight, but my mom was being too much of a leg"
by Mr. Leg November 21, 2014
Get the leg sackmug.