What is Kneecapping?
1.
The act of permanently destroying someone’s kneecaps. Often done with a
When the police heard the screaming, they knew that Shamus had been on the wrong end of an IRA kneecapping.
See
2.
What the Irish IRA and PIRA did when other drug dealers got in their way, they'd take a pistol and shoot him right in the back of the knee. This would shatter the knee, thus crippling the victim for life.