What is Deer Killer?
a person who tells tall tales and then denies it later when called out about it.
Duck: I rode up next a deer on my atv and jumped on its back and slit its throat and ate it.
Me: No you didn't.
*later that day
Random Person: Hey Duck I heard you killed a dear with your bare hands.
Duck: Dude I never said that, it was Billy.
Random Dude: Deer killer.