The best kind of burger which is sold at McDonalds. The burger has 2 patties, a special sauce, pickles, lettuce, and a slice of cheese at the bottom. The Big Mac is mouthwatering to almost everyone. The Big Mac appears to be the most popular burger to be sold at McDonalds. Legends say that the Big Mac's special sauce is a mixture of ranch dressing, mayonnaise, etc. The Big Mac is so damn awesome!

A child whom suffers from obesity and is a subsequent roaster

Big MAC (verb) the act of masturbating in front of your Mac laptop until you reach climax, and then slamming the Mac book laptop closed on top of your penis while ejaculating. Also referred to as the "MACaroni n Jizz."

Big Mac is when you crap in the toilet (or not) and you feel like you've accomplished your duty and wipe. Then you have overwhelming urge to sit and crap again. Landing that turd on top of the toilet paper which is sitting directly on top of your previous turd.

When two guys have sex with triplets. Two guys sandwich all three of the triplets in the middle, exhibiting various sexual behaviors to the liking of the group.

A funny way to insult some one, can either refer to someones weight (if they are fat), or if your just clowning around.

Used to describe something: A) Large B) Ghetto, Cool, etc.
Often used by not very cool white suburban children. Can be shortened to B.M.