After I yawned, it seemed as if the entire room was yawning. I had just accidentally started The Yawn Effect.
by Yawnnnnnn June 22, 2010
when someone yawns, then another person yawns, and another, and another, and so on; often occurs in classrooms
I yawned in class. Then Billy yawned, then Kaitlynn, then Alex, then Jill... A perfect example of the yawn effect.
by iCoinedThat1199 December 26, 2009