Derived from South Park, it can be used as a nickname for somebody called Tim, or something written by Myra and Nose all over TerrorBird's windows. It can also be used as an insult for somebody a bit stupid.
"Alright, Timmeh?"
"Myra, why's Timmeh written all over my windows?"
"You're such a Timmeh!"
Timmeh comes from a mentally chanlenged kid named Tim that I am friends. When he scores a goal at hockey he shouts "TIMMEH!!!!"
(hes not mental but he acts like it sometimes) :D You only shout it if ur name is TIm (DUH!)
Instead of "I GOT A GOAL WOOT!" You shout "TImmeh!"