To whang is to strike something with a resounding blow. Whang the door shut, whanged it against the wall, whang the ball.
It is informal and mostly American, and the word carries its own sound effect — the blow rings. It is also a noun for the sound and for the blow. The word is imitative, made from the noise it names.
1verbwhangTo strike something with a resounding blow.
“He whanged the metal pipe against the fence, and the noise echoed down the street.”
whang is a blow.
An imitative word, made from the sound of the blow. Compare bang and clang.
imitative of the sound. Compare wang.
Etymology from Wiktionary, CC BY-SA