look up any word, like blumpkin:
 
1.
used as an exclamation expressing awesomeness or excitement.
Hank: Hey, guess wut?
Clem: wut?
Hank: Mary Lou and I did the horizontal mambo last nite.
Clem: BOOM DADDY!
<high fives>
Hank: yeah…
by Sammy Tits June 05, 2007
 
2.
A word describing someone or something that is awesome, epic, or great; usually fallows the adjective, "pretty."
Johnny Cash doing a back flip off of a unicycle while on fire would be pretty boom-daddy.
by Dr. Aromus Tessola. August 21, 2010