‘flangiprop’: a person who doesn’t understand the second amendment to the US constitution.
John Smith (aka Smith, John) had an awful row with his girlfriend and so wanted to teach her a lesson. They were both aged 20 and were studying on the same campus. But, unknown to the girl who rejected him, John was a flangiprop.
So he bought a gun and went to the college and shot her dead as he thought that was what the second amendment told him he could do.
Of course he was quite wrong and the number of people killed in civilian gun crime attacks in America rose to 32,761 that day. Unfortunately some 140 million fellow Americans also misunderstood what the amendment meant and so it was not re-amended to ban civilians carrying guns.