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2.
Apple Pants; When a female is on her period and the flow is heavy enough to soak through the front of her pants, skirt or underwear and look a bit like a red, shiny apple.
I saw Brittany today, she didn't know it but she had apple pants.
by Deeks February 23, 2008
 
1.
When someone kicks you in the crotch so hard that your dick swells into the size of an apple.
Person 1: OMG I can't believe she kicked him in the nuts so hard!

Person 2: Yeah he's totally got applepants.
by Kannibis March 28, 2010