A phrase put in the title and/or description section of youtube videos by incredibly stupid people who don’t understand how copyright laws actually work. The phrase makes no logical sense because it directly contradicts their action of uploading content which they aren't the copyright holder of.
By analogy, according to people who use the phrase, someone should be able to shoot them in the head while yelling “NO HARM/MURDER/MANSLAUGHTER INTENDED!” and get away with it.
I'll laugh my ass off if someone ever tries to use "No copyright infringement intended" in court.
Stopping a girl (be you either male or female) from talking to or flirting with someone thus ruining their chances of sexual intercourse.
"Hey, I was totally hitting it off with this dude last night 'til Sally came over and minge-infringed me!'
"Dave was chatting to this skanky hoe last night, then, right out of nowhere, her older sister came over and played the old minge-infringe! He was so pissed off!"