Slide into DM's or Sliding into DM's are slang expressions people use in online or text messages when someone overconfidently sends a private message that is not always welcome.

DMs stands for Direct Messages. On some social media platforms, like X (formerly Twitter), you have a tab where you can send private messages to other users who follow you (or to those you don’t follow and who have their DM settings open to everyone). Most people just call it DM.

Because you can have an open conversation with anyone on social media by replying to a post or adding @username to your post, DMs are often used for conversations that you and the other user would rather keep between the two of you. The expression “slide into your DMs” implies that someone is very slick and brazen about sending a stranger or acquaintance a private message online.

X users tweet with variations on the phrase 'slide into DMs'.