Hits up, as on TikTok

DMS

Slide into someone’s inbox instead of commenting publicly.

"Hits up" is slang for sending someone a message, especially in a casual or direct way. On TikTok and other social media, "DMS" (direct messages) is how users privately contact each other—so if you’re sliding into someone’s DMs, you’re "hitting them up." The clue plays on the idea of reaching out digitally, where "up" hints at the direction of sending a message (like scrolling up to DM). It’s a straightforward nod to modern online communication.