Top Definition
The most efficiently epic way of wishing someone a happy birthday. Hbd standing for "Happy Birthday" and Nbd standing for "No Big Deal", It's devious Rhyme make this phrase special in a unique way..
"oooh that's right it's Phil's birthday today!"
*Goes on facebook*

Dear Phil, Hbd Nbd Buddy!
0 minutes ago · Like · Comment · See Friendship
by JG-LNB November 16, 2010

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