Holtej announced the word to the collective:

It was during the cabaret, and Krankor observed that it's difficult to really do the Hokey Pokey in Klingon without being able to say "and that's what it's all about." In years past, it's all sung in English, except for the actual names of the body parts: "You put your qIvon in, you put your qIvon out..." and so on. So Marc asked Krankor, if the word, were, say bop, how would you use it? Krankor replied that he'd say 'e' bop "that's what it's all about." To which Marc responded, "that's what it is".

And as an example of how bop is used, he suggested:

?HolQeD bopbe' paqvam
this book is not all about linguistics (Holtej)

'e' bop
That's what it's all about.
(Qanqor at qep'a' 2005, approved by Okrand)

Dung qo' pawDI'
qeylIS qorDu' je ta''e' neH
bop bommey.
Upon reaching the upper world,
no one could speak of anything,
but the deeds of Kahless and his kin.
(paq batlh)