-A term commonly used by band geeks during marching season and even during concert band season. Instead of saying "Oh, my dinkles," a band geek may just exclaim "omd." Dinkles are a special type of shoe that marching band uses on the field.
-Also, OMD may be used instead of OMG. Just because it's a band geek thing.
-First used: when a band geek was drawing band stuff on her folder in her english class, her fellow band geek asked her,
"Cool treble clef! Didn't you say you were going to draw your dinkles?"
She then said, "OMD! You're right!" and drew the dinkles.
2: No. Oh wait, OMD!
1: Hey, did you know that he didn't make All County Jazz Band?
2: OMD! NO WAY!
Variations include "OMF" Oh My Fuck, which describes a state of anger or frustration. And "OMFD" Oh My Fucken Dog, which is a mixture and hightened expression of shock, anger and disbelief.