IDM
IDM (abbreviation) means used in messages to say that you are happy with any of the options offered. Example: “idm which film, you choose.”
How to use IDM
Learner’s notesIn plain EnglishA short way of saying I'm happy either way.
Very informal in the messaging sense; a settled genre label in music writing.
Do not confuse IDM with EDM. EDM is mainstream electronic dance music; IDM is deliberately awkward to dance to.
Trace the full origin ↓Fill the gap
Can you complete this real example?
_____ which film, you choose.
Etymology
In the messaging sense, an initialism of I don't mind; in the music sense, of intelligent dance music.