1. No diggity = no doubt, for sure
2. Bomb diggity = great, awesome, the best, etc
1. "I like the way you work it. No Diggity! I got to bag it up."
(from song "No Diggity" by Blackstreet)
1. A modifier creating a new phrase or word, generally a positive. (Usually associated with the word "bomb")
2. A suffix used to imply diggitiness or diggiliciousness of a word
3. Suffix used with the word "no" creating the phrase "no-diggity".
1. "That shit is the bomb-diggity": Meaning, that the shit in question is indeed "the bomb" to the highest power of diggiliciousness.