the act of putting holding an asprin between both leggs and holding the asprin in place by adding pressure from both knees to hold it inthe middle. usually done so at events such as parties, get togehters, or anytime there is alcohol drugs or a hot guy you would like to screw.
perferably done by women
jill-"karen lets practice asprin knees ya??"
karen-"whats that??"
jill-"keep this asprin between ur legs. that way the boys can't find a way between them and i know ur not knocked up."
by concerned citizen :) November 25, 2009

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