The word da blah is most commonly used in situations that you need to speedily exit from
Mom- “can you take out the trash”
You-“DA BLAHHH”
When someone makes an apology that is half-assed, unsatisfactory, or flippant.
It generally falls flat, and needs improvement.
Person 1: We were talking about it, and he didn't understand but he was super rude. He finally understood what I was saying, but it didn't go well.
Person 2: Did he apologize?
Person 1: It was a blah-pology. He tried.
Grah Blah Blah Blah is an exclamation originating in the 757 area of southeast Virginia, or Norfolk, more specifically. The origin comes from the the noise made by a large group of unnamed fly ass thugs in Norfolk, emulating the noise of vomiting.
"Bitch! I keep it real! Grah blah blah blah!"
When someone drinks caffeinated coffee to boost energy.
I had a blah-feeling coffee-drinking this morning. I'm ready 'till my lunch break!