Top Definition
In the summertime it's kinda hard to figure out if a girl is hot or not because her sunglasses cover most of the face. To devide the hot and ugly girls you just need to see who's keeping the sunglasses on for the longest time for instance in the evening.
Mid day
#1,#2 - Oh, that girl look's really hot!!

Evening
#1 - Probably not, she's still got her sunglasses on..

#2 - yeah..the sunglass theory...damn it!

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