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

by TTENNEB EKIM September 27, 2005

Boy : look at that sperm whale
Girl : sperm whale? Thats a Whale Sack!
Boy : whats a Whale Sack?
Girl : you.
Girl : sperm whale? Thats a Whale Sack!
Boy : whats a Whale Sack?
Girl : you.
by whalesack May 26, 2014

When your scrotal sack sticks to each side of inner thighsl usually due to long term sitting or swass and when you stand up it resembles the full sails of the Black Pearl.
"Man, I was working in the office all day and when I got up my sail sack had me thinking of my next vacation."
by rounder222 December 23, 2006

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

A prank that is pulled usually in high school by taking someone's back pack, taking everything out, turning the backpack inside out and putting the stuff back in.
by YarmouthClippers June 13, 2009

A term used to describe the virtual balls of people who trash talk in an online thread because they know you can't throttle them through the screen.
by TheGhostrider420 August 7, 2014
