-The German word true.
-Stimmt is also used as a cult word for a skool in Western Pennsylvania.
-Made into a cult word so that white people could make fun of the ebonics word truf. Say it while pounding your right fist against the other person's right fist as you both say stimmt.
(Eric)Stimmt it up, Seth
(Eric) Alright now get out of here, turd flake!