To make sudden loud noises, and often repeatedly, especially by exploding or hitting something.
My head was banging after drinking all night at the concert.
To hit hard.
David and Mary banged into each other.
To engage in sexual intercourse.
We can hear the couple banging upstairs.
(with "in") To hammer or to hit anything hard.
Hold the picture while I bang in this nail.
To cut squarely across, as the tail of a horse, or a person's forelock; to cut (the hair).
To inject intravenously.
Do you smoke meth? No, I bang it.
Having the hair styled in bangs.