When in a public bathroom one takes a wad of toilet paper (shit tickets); and holds it over ones asshole to hide the explosive fart and or shit that is about to rumble the bowl.This act can save one much embarrasment especially on a first date or while visiting the in laws at their tiny camper.
Be cautious a muffler may be a bit messier than the standard crap, but may be used in emergencies with guaranteed results.
ex 1.)*noun - Once in the bathroom,I decided to use a muffler after holding in that fart the whole way to his apartment.
ex 2.)* verb - Joe put a muffler on his tailpipe so his mother in law would not be offended by his morning dump.
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