Potty Mouth Meaning

(idiomatic) A person having this characteristic.

Example: 2007 Nov. 16, Janet Stewart, "Feral cats need someone to lend a hand," Winnipeg Free Press:
  Enough of my bathroom humour, my potty mouth.
2007 Dec. 5, Mike Redding, "Just being honest, I swear," WCNC.com:
  I’ve turned myself into a potty mouth. I swear. Too much.