noun/verb; A teaf (or teef) is a joint with tea leafs in it. The tea has a natural relaxant which makes you extremely relaxed and chilled out after you smoke it, depending on how much you smoke.
Hey you smoke weed?
nah I just teaf.
wtf is a teaf...
read the entry on urban dictionary, the person who wrote it is the most awesome son of a bitch that ever lived.