A derogatory term for someone who doesn't agree with what is being said at the time.
Tom "tottenham are the best team in the world"
Mark "....erm no....arsenal are you turd biscuit"
A hunk of poo that is reliquished from the anus in a shape similar to a hockey puck. These are a rarity.
Julia is so lucky, she unleashes turd biscuits on the dizzle, I'm so jealous.