An individual who sticks to a belief or theory even after the through debunking of that belief or theory
that bigot is a real pusbrain.
by BIE BIE June 23, 2006
A term of derision that began to develop in the 1950s. A person who is held in contempt by others for making poor decisions or for being generally ignorant.
"You pus-brain! You're supposed to throw water on the fire to put it out, not gas!
by Spyder Rocker March 12, 2016