Student or Learner
It's hard to understand joke in English. I read a joke.
"The jokes will have you in stitches! What do you call an exploding monkey? A baboom! "
I know "boom" is the sound of explosion. What is "baboom"? Why is it involved with exploding monkey?
This is a clever mixture of two words,
Baboon(meaning a monkey) + Boom(the sound of explosion)
The sentence also clearly says,"what do you call an exploding monkey?" a baboom.
Thus it is more an invented word.