Top definition
The echo produced when someone is talking in a bathroom. Particularly amplified when on the receiving end of a cell phone call.
Dude, call me when you're done. I don't wanna hear your bathecho.

-Alternatively-

I was rockin' a deuce at the mall, and two people were talking so loudly the bathecho was almost unbearable.
by ULTIMATUM 7 July 17, 2009
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