2. substitute of yea
3. used when there's nothing else to say
4. used when you're not paying attention
5. can be used as a funny form of one
friend 1: Is that your car? friend 2: LoL! the 1978 chevy? TREW~!
friend 1: so umm...yea. friend 2: trew! trew~! trew~~!
friend 1: so yesterday...are you even listening to me? friend 2: treW~!
friend 1: give me a funny form of one. friend 2: TREW/TREW