That dreaded thing you want to see on your YouTube channel. Usually, your YouTube channel gets a copyright strike by uploading a video with a copyrighted song or movie in it and YouTube takes that video down.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Copyright strikes are warnings given to YouTubers for playing a song that is copyrighted or using copyrighted content.
A strike given to YouTubers for one of the three reasons:
- Stolen content
- Someone playing "ITS RAINING TACOS" and being an annoying little rat that you want to stomp its skull out
- Your channel being hacked and YouTube having no common sense