The Bomb refers to the 2 nukes that were dropped on Nagasaki and Hiroshima.
One meaning of the term: Little Boy uranium bomb on trailer cradle in pit, bomb bay door in upper right-hand corner, August, 1945.
Somebody set us up the bomb!
The coolness of "the bomb" goes down another proverbial notch, when it is referred to as "DA bomb".
"Get the fuck outta my house! Who do you think you are saying "da bomb" in my place?"
"No fuckin' exceptions. Get out, you're not Courtney Love"