Mouse on a harley.

A rough sounding fart that you make while sitting on a leather seat.

"Is someone using a jackhammer?"

"No, it was a mouse on a Harley."

by impasta_pasta October 22, 2014

Mouse on a Harley

A diversionary excuse used when caught farting in public

John was standing in the break room at work and tried to sneak one out.
Jane walked in and having obviously heard it made a face at John.
John said, "Did you hear that? Must have been that mouse on a Harley again."

by Miggity Miggity April 05, 2018