A White Chimp out is when a
white person removes his/her facade as a civilized
human being and releases his/her Inner White Chimp; as in to start acting violent and
out of control. Basically to start TNB'ing; randomly Jumping/beating someone, murder, rape...you know, the typical.
I was trying to reason with that client, but all of a sudden he chimp out on me and started screeching, became violent, and started beating random people around. We had to call the police to control him.