A code-word for weed that can be used anywhere without anyone knowing what you're actually talking about. It's an evolution of the 1337 spelling for weed - 'w33d' The 33 was then taken from the middle of the word and is used on its own. Comes straight out of Caterham! Brap brap!

The percentage of sexually active highschoolers who will have intercourse with more than 4 people before gradcuation- often used as a replacement for the words slut, hoe, whore etc.

33 sometimes refers to anal sex, because it looks like 2 butts

This has two meanings. Three more than Thirty or in Arabic 3ala 3airy which means in English "On my penis". It is not actually used for that purpose but it usually means that I don't care. The definition was created by two guys in high-school.

When two gay men are in bed together, usually referring to spooning naked.

Two thumbs up. Something great
If you count binary on your fingers, and one of the thumbs is the LSB; gives 2^0 = 1, then the other thumb wil be 2^5 = 32. The two thumbs will then yeald 33 (100001).