habbledabble
A stupid noise you make when you're trying to be funny but you're just being a complete idiot.
I did a 'hobbledabble' in the middle of a spelling bee. I got eliminated.
My friend said 'hobbledabble' to my dog. Now my dog is laughing and eating my homework.
I yelled 'hobbledabble' in a restaurant. The waiter gave me a free pizza.