DM (Direct Messaging, because it's not already obvious that it's direct).
Newfangled term used by the ever increasing hoard of subverted degenerates on
social media who are too
retarded to use the actual term.
Correct term is actually PM (
private messaging) because messages are private.
"hey, i sent you PMS did you
get them?"
-uuugh, lol no i only got one PM
"hey, i sent you DMS did you
get them?"
dude, i don't
play d&d anymore, i don't need a DM