common
"Common" is a very useful English word with several important meanings. It works mainly as an adjective, but it can also be a noun. Here are the most common senses you will encounter.
In British English especially, calling someone or something 'common' can mean you think their behaviour or taste is rude, vulgar, or lacking in refinement. This is a judgmental use — be careful, as it can sound snobbish or offensive.
British English, social commentary · Still used, but considered old-fashioned or snobbish · figurative
She thought it was common to talk loudly on the phone in a restaurant.
His grandmother considered chewing gum in public to be terribly common.