1 definition by spencer93
To bend your leg, making an improvised vagina with the inside of your knee, then you or a partner insert one or more fingers and commence finger-knee intercourse.
I was bored in class today, so I extrapolated myself.
My girlfriend extrapolated me all night long, because we don't believe in sex before marriage.
My girlfriend extrapolated me all night long, because we don't believe in sex before marriage.
by spencer93 April 25, 2010