Do one's (own) thing American informal
The phrase means to follow one's skills that someone wants to do without focussing on something.
My daughter tells me she wants to do her own thing when she goes to university.
We always encourage our children to do their own thing because they are mature.
The verb "do" should be conjugated according to its tense.
Many documents said that the phrase appeared in The Merchant’s Tale and Chaucer in the 1960s.
To be quiet or stop making loud noises
Guys, when you do group work, please keep it down to a dull roar.