Top definition
A computer thats sole purpose for existence is accessing sexually explicit material for the purpose of self-gratification.
Hammo: Hey Timmy, got any porn vids, I just got blue-balled that that girl with no tits

Timmy: Sorry mate, I don't have any vids, but the jack mac is full of pleasing material.
by paddymac September 10, 2009
Get the mug
Get a jack mac mug for your bunkmate Nathalie.