Top Definition
A tan line around someone’s eyes from wearing sunglasses in the sun for too long – which looks like Batman masks.
Boy : Umm...What’s up wid the “Batman Tan” you got going there?
Girl: Aargh! I was like at the Tennis match for like a 100hours last Saturday and the result is...well you get the picture....
by poozies January 30, 2011

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