Knockouts

noun

1. The act of making someone unconscious, or at least unable to come back on their feet within a certain period of time; a TKO.

   "The boxer scored a knockout on his opponent."

2. The deactivation of anything.
3. Something wildly popular, entertaining, or funny.

   "If you've ever had a sack race, you know it's a real knockout for kids and adults alike."

4. A very attractive person, especially a beautiful woman.
5. A partially punched opening meant for optional later removal.

   "They left a knockout in the panel for running extra wires someday."