A person who calculates the weight of their turd with a simple equation. Before-After=Turd or B-A=T. They accomplish this by weighing themselves before they sit and after they shit. Which gives them the approximate weight of said Turd.
Verb-Turdulate, Turdulating, Turdulated
"Remember in 'Next Friday' when that guy said, 'I feel five pounds lighter'?"
"Yeah, that movie was funny."
"He must have been an expert turdulater, because I just turdulated and mine was only 2.5 pounds."
"Dude, I told you not to talk about your turds during Jeopardy."
"What's the number for the plumber again?"