1. Used as an exclamation of victory. Named for the Triumph tr5, a rare automobile built in the United Kingdom between 1967-1968.

2. A farewell or "signoff" encouraging good fortune to friends or loved ones.
Example:
1. "Oh man, did you just see Johnathon bench press that Cadillac? tr5 baby!"

2. "Good luck getting the kangaroo back into the cage, I'm leaving. tr5."
by Penguinrecorder October 7, 2009
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