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An either voluntary or involuntary (often involuntary) effect that a person may have when walking up to a group of friends. People don't usually notice people with the batman effect when they walk up because they are quiet and dont say anything when they do so, also, it usually scares the person/people that the person is walking up to. Just like the DC comics superhero, Batman, hence the name "Batman Effect"
"WOAH you scared me, i didnt see or hear you coming, it's like you have some sort of batman effect." "Yeah i get that a lot, I don't even do it on purpose, it just happens"
by SuperSario15 November 28, 2006
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