If you're in a club and you don't really know if you should already go, wait for 3 songs in a line to suck, then go. Also known as Three Tune Condition
Jay: Shall I leave already?
Mitch: Dunno, use the Tri Song Clause!

Julie: Nah, i hatet the last three songs, dunno if I should stay any longer...
Mary: The Tri Song Clause says you should!
by DaVati October 16, 2013
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