To take a dump in a pillow case or similar sack-like bag and then beat your partner with it. Commonly practiced by but not strictly limited to members of the homosexual community.
After a tiresome day at work Tarquin decided to go home, kick off his shoes and partake in a good poo sacking.
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A bean bag, grey in colour, conspicuously marked, ie. with faecal stains as well as reproductive stains, that is over 15 years old.
It is essential to the achievement of saying the word "Naarnnnnggg correctly.
Man, I was over dere, sittin' on dat dere Poo-Sack when I saw sum quantum fyzix shit rite dere mandem, fook me!
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Defines an Iranian crackhead who is the highest paid cashier. Also known as fiend.
"Daniel, we're smoking on your Poo Sack