1. The posessive form of you.
2. A term for the contraction of you are. The inventors of this AOL-Culture (Refers to the culture of the mass of internet users who regard the technology they frequent in defacing of as a right, not a man-given privalige from, quote, nerds) seem to be unaware of the fact it has already been invented and is displayed in the following way: you're.
1. Please take your socks off, as I wish to smell them vigorously.
2. Lolzort machine d00de, your a n00bz.
The word to imply a lack of care whether the proper word is a pronoun or a contraction, you've given up trying to figure out this whole english language thing and wish to flaunt your ignorance by sticking everyone's noses in it
Your is a normal word, it has a proper definition just like any other. However becoming more and more prevalent is idiots who are trying to be smart and think they are doing so by using the full spelling of 'YOUR' instead of 'UR' to mean 'YOU'RE'. This mistake is extremely common because in every day life you hear people saying 'your' which is actually spelled 'you're', as in you are.