Definitions by IAmTheThirdWheel

Third Wheel 

A person who hangs out with two other people. The two other people are closer to each other than the "Third Wheel". People generally feel awkward when the third wheel mentions how much it sucks to be the first wheel (They actually normally get mad).

-Did you invite Hannah?
-No, she's just the third wheel anyways

Third Wheel by IAmTheThirdWheel April 20, 2015