Well, you wanted gross. These two seem appropriate.
2Ki 18:27 & Isa 36:12
"But Rabshakeh said unto them, Hath my master sent me to thy master, and to thee, to speak these words? [hath he] not [sent me] to the men which sit on the wall, that they may eat their own dung, and drink their own piss with you?"
These seem to be repeats. Use the KJV for best effect.
My best friend used to use these two to freak out his father, an Assembly of God preacher. He said if the word is in the Bible what's wrong with me using it?
Mustang