Contrary to popular belief this is not a derogatory term but an object used by prostitutes. It is used to inefficiently and unhygieneically clean their vaginas between sex with different customers. It is generally a dirty looking towel or some newspaper that you wouldnt wanna touch with a barge pole (this is a very very very long pole)
Adj. Pertaining to one who is a slut, a cunt, a douche bag, or a variety of the three. Sluntbag is usually used towards females who cheat on their boyfriends, but can be used on males who give the same courtesy to their girlfriends by fucking their best friends.
Devin tried to sleep with Linda when he's already dating Becky. What a sluntbag move.
Perhaps if Sarah wasn't such a sluntbag, she would have been better off with her ex Josh.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.