Diarrhea bitch

A person who reneges on their promises, and actively conspires to sabotage your reputation behind your back. The typical diarrhea bitch will take a diarrhea shit in a public space and tell everyone it was you.

Melinda: Did hear you about Sharon?
Sarah: No. What?
Melinda: She's a diarrhea bitch. She stole all the food from the conference room and blamed it on Mikhail. Now he has to pay for everything!
Sarah: Wow. What a diarrhea bitch.

In reality it was actually Melinda who stole all the food from the conference room and blamed it on Mikhail. Ergo, Melinda is the true diarrhea bitch.

Janine was a massive diarrhea bitch when she stole $75 from Karen's purse and blamed it on Kyle.

Dakota is a massive diarrhea bitch for ghosting Jizelle at the mall when he promised to pick her up 6 hours ago.