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1.
A person, commonly of the female sex, who possesses a strong affinity for lacrosse players; lacks self-restraint when in the presence of financially endowed, but intellectually impaired, genitalia-minded athletes.
"Who on the lacrosse team hasn't Katie slept with?"
"No one! She's such a lacrostitute!"
by Anti-social Hoya April 06, 2008
 
2.
a fiesty female chasing lacross players after games. aka a jersey chaser
Our cheerleaders are a bunch of fat and ugly lacrostitutes.
by The Birdwatcher March 23, 2003