Bazinga is is a word used by to signal that what he said immediately before this utterance was to be taken as a joke.  

"Even in my sleep-deprived state, I've managed to pull off another one of my classic pranks. Bazinga!"

So, if no one gets your humor, you might try cuing them in with this shirt!

This Bazinga t-shirt is inspired by the TV Show The Big Bang Theory.

Get this great Bazinga T-shirt today.