Tap out

Tap out can refer to:

Tapping out a rhythm
Tapping a fare card on the way out of a transit station to register the exit fare
To be completely tapped-out, see exhaustion
A submission in combat sports.
Tapout (clothing brand), a U.S. based business enterprise producing clothing and miscellaneous gear targeted at the mixed martial arts community, as well as an MMA-centric magazine (formerly Bodyguard Magazine).
TapouT, an MMA-based reality television series on Versus.
Ultimate Fighting Championship: Tapout, a series of video games for the Xbox console.