Whoring one's self out, giving booty for free. Early 20th century term for a slut.
Dude 1: Dude that chick last night was just giving out booty for free!
Dude 2: Indeed, the morales of that freebootress were quite loose.
Dude 1: Thats what she said.
Dude 2: Please don't diminish the impending threat of freebootery.