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When a girl's assets look alternately excellent and non-existent on a day-to-day basis based on shirt & bra.
"Dude, did you see Jenny's boobs today?? They were looking AMAZING!!!"

"Yeah, but I saw her Tuesday and it was barely clear she had much of anything."

"Man, she must have them chameleon boobs!"
by b110 January 03, 2009
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