To get put down firmly, surely, and permenantly. Pioneered by the one and only Duffet Smith, Trinity-Raul has suffered many a time in physics lectures.
Trinity-Raul: "{insert complicated question here}" Duffet Smith: " Yes, but physics." Trinity-Raul: "Aaah" Spud: "Duffet Smithed"
Riches classic bop manoeuvre - The Finger dance, accompanied with appropriate hip thrusting