Doing something that you think will make work easier but having your boss tell you that you are a dumbass until the crack fog clears and you can continue doing your job. Most people that are piss ignorant are short guys that wear 1988 calculator watches, wear a rain suit on a dry summer day, generally any oilfield hand or no matter what they do is never good enough or never right in decision making
What are you doing cleaning that pipe wrench?
It was dirty as hell
That's fucking piss ignorant
A shitty job, usually a summer job for teenagers who are really desperate for money and will lick cow balls to get it. Sung about in a Patti Smith song.
"Hey, man, Chelsea works at a real piss factory." "Yeah, I heard she has to shuck corn for six hours a day."