keep a low profile

Stay out of public notice, avoid attracting attention to oneself. For example, Until his appointment becomes official, Ted is keeping a low profile. This expression alludes to profile in the sense of “a visible contour,” a usage dating from the 1600s. [Late 1900s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.