A sexual act or punishment in which the male punches himself in the testicles until they swell up to two or three times their actual size and tea bags the recipient unforgivably. The act is not complete until the victim blacks out or receives serious facial wounds.
Mike- "Jake stole my Reese's peanut butter cups yesterday. If i'm not mistaken i'd say he was asking for an Idaho potato sack."
When a group of 2 guys or more find a really attractive girl, get her alone, and throw a potato sack over her head. They then cut out as many holes as there are guys in the potato sack. Finally, they all stick their penises in the holes and wait to see what happens.
A group of my friends and i had some potato-sack madness last night, and i got a special surprise when i inserted...
Girl who is so impossibly hot and cute at the same time that you just want to throw her in a potato sack and marry the shit out of her.
Guy1 "Rihanna is so hot.. my god."
Guy2 "YeahRihanna is hot as fuck."
Guy1 "Jessica Biel is hot, too."
Guy2 "Fuck No. You couldn't be more wrong, Jessica Biel is a straight up potato sack girl, to say she's hot would be total understatement."