A cross between a slut and a looter - like a gold digger, only more in the moment (i.e. social situations, bars) as opposed to long term (i.e. marriage). A slooter provides 1st and 2nd base sexual favors in exchange for drinks at the bar or other such expenditures.
Man, this chick has made out with 4 dudes since we got here - what a dirty slooter!