m confused between 2 meanings..which one s correct?

Thank you for being bold enough to ask a question. I want to honor you by answering truthfully and thoughtfully. A person with a "potty mouth" uses foul expressions when they speak, often curses and speaks rude and inappropriately of others. Perhaps the only place that sort of language should go is down the toliet! It certainly is unkind and thoughtless toward others.

thnx :) @fromroad

Well someone whose mouth is used for a toilet.