as in "she bites her lip,” referencing the tendency of modest females to bite their lip in order not to moan audibly when in sexual pleasure
1) A reference to a girl that is sexually active, but discreetly so
2) A girl that is lustful or wanton, but only in private setting
She's had sex? I thought she was a virgin!
Yeah, well, she bites her lip.

You'd never guess it, but she is a tiger in bed.
I guess she bites her lip.
by mk1 May 01, 2007
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