Pretty much no one uses that word on the street to act cool... the only time I can think of is if you tell a friend that you are going to hustle someone, either for money or just to show off. Its probably used jokingly if its ever used, not as a way to seem cool

seldom or never at all. (preferably never if you're not native speaker)

The coolest way is to use it as a noun: I am charmed by the hustle and bustle of cosmopolitan London. There is no need for any decent person to talk like a gangster or a Disney character.

the word has different meanings...but as you asked for informal ones: 1) to sell or obtain sth, often illegally They survive by hustling on the streets. 2) to act in an aggressive way or with a lot of energy 3) to work as a prostitute and as for NOUN usage: busy noisy activity of a lot of people in one place: We escaped from the hustle and bustle of the city for the weekend (all from oxford dictionary ^_____^ )