dim twat Share definition Flag When you call someone a dim twat you are saying they are very dumb. Luca said, "Wow. She is such a dim twat." "I know right she is so dumb," said Lola. dim twat by Uuuuuuggggghhhhhhh August 23, 2017 0 0 Get merch Get the dim twat mug. Buy Now — $32.95 See more merch