Cinematic-Level Threat. Something big and dangerous that would make for a killer movie.
Thanos from The Avengers, wanting to erase half of the global population was a CLT in comic books. So they made it a movie.
Whenever someone cites an 'injury' for not playing, practicing, or competing. Comes from 'clit sprain', which said person has torn, sprained, strained, impinged, or tweaked their clit.
Person one: 'I can't practice today, my leg/shoulder/arm/knee/etc. is hurting me'
Person two: 'Aww little baby, did you have a CLT sprain?'
Person three: 'Yeah dude, shut the fuck up and train'.