Habonk
A habonk is a person who thinks they’re tough, but they’re just loud and clumsy.
My brother is a habonk. He screamed at a mosquito and got bit by 10 more.
My teacher called me a habonk because I spilled juice on the floor and it looked like a mess.
That guy at the bus stop is a habonk. He tripped over his own feet and fell into a trash can.