dm'ing
The abbreviation for "Direct messaging" usually referenced to the social media website, "twitter"
"If you want news on my upcoming album, I'm dm'ing people."
DM'ing
Running a D&D campaign as a DM (Dungeon Master).
Jane: Hey, wanna hang out this Saturday?
Mike: Sorry, can't. I'm dm'ing a campaign with my mates and it's been two months since we've had matching schedules.
Jane: Oh, nice! Can I join if you start a new campaign?
Mike: Sorry, can't. I'm dm'ing a campaign with my mates and it's been two months since we've had matching schedules.
Jane: Oh, nice! Can I join if you start a new campaign?