Gary Shirley Calls Amber Portwood "Sluttish"

Gary Shirley should know better.

We know he's not the sharpest tool in the shed, but if there's one thing you don't do, it's call your baby mama "sluttish" on the phone ... to her cousin.

In a TMZ audio recording from just last month,  Gary is on the phone with Krystal, the cousin of Teen Mom star / Gary's baby mama Amber Portwood.

Gary explains to Krystal that he kind of has a crush on her, pointing out, "You've got things that Amber don't." Like a job, and/or a full set of marbles.

Then Shirley drops an all-time line, praising Krystal: "Amber is sluttish. You've been with six dudes, Amber's been with f**king a million." Listen here:

Gary Shirley Trash Talks Amber Portwood

Source: The Hollywood Gossip