Pulling an Oran

An act of supreme ignorance or stupidity, but will often not be caught due to its often hidden or unimportant nature

Tom: Did you hear how Steve pulled an Oran on his term paper?
Oliver: No, what did he do?
Tom: Apparently, he accidentally typed 'fuck' in the middle of the paper and the teacher caught it - gave him an F
Oliver: Yea, that's pulling an Oran all right