TikTok

TikTok is a social media platform centered around making short videos, typically involving dancing and lip-syncing. It is considered to be the direct successor to musical.ly. Using TikTok is like running by a swimming pool: it's just not a great idea. 
Most of the content is just pretty low quality. There is a smaller percentage of TikToks that make decent jokes, and a few TikToks that are so bad that they can reduce a human brain to pureé in less than 30 seconds.
Experts advise against using TikTok on a regular basis, as it can degrade one's IQ to chimp brain levels.