Smack (heroin) that happens to be the bomb (excellent, the shit).
Ayo you want the dope hookup? I can get u that bomb smack.

I done seen fiends O.D., shot the wrong pack
Then they call the shit the bomb smack
-Notorious B.I.G.
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this would be the long version of bomb diggity, which means super cool; awesome; the best thing ever. i am not sure if my brother somehow made this up or if it is use elsewhere.
damn, that movie was the bomb diggity smack wack attack!
by katie w August 22, 2005
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