A forever DM is someone who is either forced or willingly always plays the gamemaster or dungeon master role in table top RPGs. They spend countless hours on their campaigns just for players to shit on it.
Player: "Hey dude can you DM a oneshot this saturday?" DM: "Why can't you just do it? It's your game after all.." Player: Because you're our forever DM you bitch!"
by SomeGuyIsHere July 27, 2021
Get the forever DMmug. A direct message, usually private and on a social network such as twitter or Instagram, with the purpose of initiating courtship.
“He slid into mary’s DM even though he is dating Jane”
“She was tired of boys sliding into the dms but never talking to her in person”
“She was tired of boys sliding into the dms but never talking to her in person”
by GenZBoomerTranslator November 24, 2019
Get the Sliding into the DMmug. 
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.
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.
by Dr.Business May 20, 2015
Get the Slide into the DM'smug. by RustyNailTermz May 19, 2021
Get the Down in the DMmug.