When you start a direct message chain on Facebook, Instagram, or Twitter, with the hopes of acquiring the booty.
Shawn: Bruh, have you seen Aurora's Instagram lately?
Christian: YEAH! I'm about to slide into the DM's on that right now.
Shawn: She won't respond to you.
Christian: Check it.
Shawn: A successful slide.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.