ba dum chhh
The dumb sound you make with the snare and bass drum when you think you're the funniest person in the world and then you crash the cymbals like you just discovered pizza.
I told a joke about my pet goldfish and did a ba dum chhh that made my teacher roll her eyes.
At the bus stop, I did a ba dum chhh and scared a kid who was eating a sandwich.
After I ate my entire lunch in one bite, I did a ba dum chhh like I just broke the sound barrier.