YADADAMEEN: A colloquial originated phrase from the Bay Area, California referring to the statement of "You know what I mean" after a declarative sentence or claim have been made by an individual. It holds an urban and slang syntax. It is a sister phrase of the East Coast saying of "Nawmeen."
Poppin' yo colla and doin' da Thiza Face while bumpin' Mac Dre or any Bay Area artist, then yellin' "YADADAMEEN!!!"
Bay Area slang for, "You know what I mean?"
Popularized by the hyphy movement, but in my opinion, comes originally from thick spanish accents. I had a landlord in San Jose who would say it constantly and I don't think he was into hyphy...