Top Definition
The obvious and intentional noise you make in a public bathroom stall to alert others when the enter the bathroom, that the stall is being occupied. Includes the ruffling of the newspaper, the pretend cough, and clearing ones throat.
Some guy was talking on his cell phone while in the bathroom, so I gave him the stall alarm to know that I could hear everything he was saying.
by Devan Kadwish April 28, 2010

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