idiotdummy Share definition Flag When a driver will not merge over when you are getting on the freeway that person is an idiotdummy. Joe-That person will not let you get on the freeway.Bob- Yes he sure is an idiotdummy. idiotdummy by CT1973 November 29, 2011 0 0 Get merch Get the idiotdummy mug. Buy Now — $32.95 See more merch