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Originates from a group of teens located in Brooklyn/Lower Manhattan. It can be used as a pronoun, adjective, or just a word added to enhance a sentence. When used in dialougue, people familiar with its roots and significance understand its meaning in that context. People unfamiliar with it become utterly confused. It is commonly shortened to rah, diggz, or rah diggz.
"What up rah!"
"Yo rah!"
"That's rah"
by stefang February 28, 2006
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an exclamation of shock or suprise, based on the convience of the words "RAHHHH" to deal with the initial shock stage and "DIGGA" as the comedown and realisation

there also happens to be a most peculiar woman rapper who hides her butters face behind large sunglasses and shares the same 'name' as this expression, whilst busta rhymes has his hand up her ass puppeteering her every move (quite literally).
Jonny: I just won the lottery
Billy: Don't bullshit me, mate, I'm no fool
Jonny: No seriously, look at the ticket in my hand, I ACTUALLY did win
Jonny: Rah digga? You keep using words like that mate and you won't have a share in my winnings
by Willis McGee July 26, 2006
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