hustle
n. C / Un. a busy way of working or living, or a clever way to make money. It often describes working very hard or having a side job to earn extra cash.
n. energetic, busy activity or a specific method of earning money, often through side jobs or entrepreneurial effort. In its more negative sense, it refers to a deceptive act or swindle.
She has a side hustle selling handmade jewelry online.
The city is full of hustle and bustle, with everyone rushing to their next meeting.
In today's gig economy, many young professionals maintain a secondary hustle to supplement their primary income and hedge against market volatility.
From Dutch husselen or by metathesis from Dutch hutselen (“to shake up”), a frequentative of hutsen (“to stir, to move something (back and forth)”).
Often used in the fixed phrase 'hustle and bustle' to describe a busy place. When referring to a side job, it is countable.