The act of clogging a toilet and then leaving the facility without fixing the issue or notifying the appropriate parties.
Sully: “What should we do for dinner tonight? How about Applebees?”
Rodge: “Can’t do it.”
Sully: “You don’t like Applebees???”
Ridge: “Oh, I love Applebees. I just can’t go back because I hit them with an Irish Clog last Thursday.”