Top Definition
A trend that reappears every decade.
Person 1: OMG! Tetris is sooooooo funnn!!!11
Person 2: That is such a decatrend. You probably just found out about Rubik's cubes too.
Person 1: OMG...HOW DID YOU KNOW THAT...that's so scaryyyy.
by Celebi+ May 06, 2011

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