To defecate a somewhat loose watery stool with a gale force fart behind it so as to cake the excrement like a mud pie against the porcelain toilet bowl.
Please excuse me for a moment from this delectablechocolate sundae desert that you made for me, but I have the need to use the ladies room in order that I might blow some mud.
When one finally has sex after an extended period of abstinence. Sexual intercourse is compared to starting an engine that has been sitting for a while and has accumulated excessive carbon deposits in its inner workings.