bang (something) against (something)
To smack something against another item or surface. I broke the plate when I accidentally banged it against the countertop. She banged her cup against the table to show her displeasure.
bang something against someone or something
to strike something against someone or something. (Usually refers to striking with something that can make a banging noise.) She banged the spoon against the pan to call everyone to dinner. He banged the pan against me and made me very angry.
bang against someone or something
to knock or strike against someone or something. The shutter banged against the side of the house. The board banged against me and hurt my shin.