Slut Trained 

Refers to a guy's altered sexual behavior in bed after he has been doing it with a slutty girl for a long time.

Refers to the sexually aggressive or kinky behavior traits of an otherwise sober guy in bed,the behavior having been developed due to repeated intercourse with a slutty girl

Eg 1:
Boy & Girl's first time:
Boy: Can i go down on you ?
Girl: Boy, What kind of slut training have you been getting ?

Eg 2:
Michael Douglas: Can we try sixty nine or how about doggy style ?
Catherine Zeta Jones: Boy that sharon stone has got you slut trained for this stuff while filming that movie, hasn't she ?

Eg 3:
Boy 1: So i broke up with samantha and hooked up with britney.
Boy 2: Sweet ! How's the sex ?
Boy 1: Not too good, britney ain't up for all the stuff i am into. Freaks out at anal.
Boy 2: Dude samantha has got you slut trained, you need to take it easy with britney.

Slut Trained by strikeforce October 9, 2013

slut trainer 

Usually a male but occasionally a female that derives sexual pleasure from encouraging an otherwise proper woman (often married) to act in an overtly sexual manner. This often begins with simple changes in her dress and proceeds over time to providing her with outlets for indiscriminate sex.

The slut trainer provides her with encouragement, opportunities, and materials. The preferred raw material is either a virgin or a previously faithful married woman (who becomes a slut-wife]. He often becomes quite possessive of "his slut".

John took her to the club and got her to fuck five different guys and suck eight. He's a professional slut trainer

slut trainer by Johnny Q. September 6, 2006