slang word - to get something . to be successful in something .it comes from another similar one using as slang- крутиться - to make much affords to get life success, to earn money . Чем он занимается ? Крутиться в шоубизнессе .What does he do? he works in show busyness.
Another one here- Закрутиться - to forget to do something on reason to be busy . Ты принес кнугу? Извини , совсем закрутился вчера ,нет .Did you bring the book ? Sorry , i was very busy yesterday, i forgot it.
Stable Russian expression- Крутиться как белка в колесе . to be very busy and to be active like a squirrel running in a circle moving cage