Tik Tok hair is a haird-do created by teen boys on Tik Tok (e.g. Eboys, softboys, etc). The hairstyle consists of hair that looks like you've been electrified, or hair parted in the middle and straightly swooping over the eyes. These guys act like they're so hot and irresistible (e.g. by licking their lips and staring at the area seductively), when in reality, they're 15-year-old boys. Most girls obsess over these dudes. Popular examples include Jeremy Hutchins, Dom Brack, and everyone in the sway house.
Person A: *Walks in with hoodie covering hair*
Person B: "Hey... why's your good up?"
Person A: "I made a mistake... I big big mistake...I tried the Tik Tok hairstyle"
Person B: "EWWWW!!! CHANGE IT BACK!!!