Also, play safe. Avoid extreme risks, as in I played it safe and bet only a dollar, or Let's play safe and get a backup in case the announced speaker gets sick. [c. 1900]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.