do one's own thing

do one's (own) thing

To do what one is interested in or skilled at, rather than simply doing what everyone else does. You don't have to go to med school just because your sister did—you need to do your own thing. Andrea is very independent and usually just does her own thing.
See also: thing
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

do one’s (own) thing

tv. to do what one wants; to do what pleases oneself no matter what others think. I’ve always done my thing, and I don’t see a great amount of benefit from it.
See also: own, thing
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

do one's own thing, to

To find self-expression or self-fulfillment in some activity. Although this term is very old indeed—numerous references can be found in Chaucer, as in The Merchant’s Tale (“where as they doon hir thynges”)—it became hackneyed during the 1960s. Rebelling against the establishment, the unconventional “dropped out” of society and joined communes where they would “do their own thing.” One might wonder how many of them were familiar with Ralph Waldo Emerson’s essay, Self-Reliance (1841), in which he said, “I have difficulty to detect the precise man you are. . . . But do your own thing and I shall know you.”
See also: own, to
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer