An Armbourdor, found in nearly every take-out/delivery pizza joint in the country, is the little plastic lid support placed in take out order boxes. The purpose of an Armbourdor is functional in nature. The idea is that you can stack multiple boxes with out fear of smashed pizza. Armbourdor.
''OMG, the idiot forgot to put an Armbourdor in my box...now my pizza is ruined.''
and
''Hey, manager. I didn't put an Armbourdor in that pricks pizza.''
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.