Slide Day

A very special holiday where two people celebrate the event in one has slid into the other's DM (direct messages) to initiate a relationship, exotic night, friendship, etc.

Two years prior to Tia answering Shaq's DM on Instagram, the two celebrate their Slide Day as a couple.
Did you hear about Shaq sliding in her DMs and now they're a couple.

I can't wait for me and Tia's Slide Day so we can celebrate.