stay on (one's) toes(redirected from they stayed on their toes)
stay on (one's) toes
To be and remain active, alert, and focused. With two kids under the age of five, you have to stay on your toes throughout the day! This attorney is known for using really deceptive and underhanded tactics, so stay on your toes during the trial.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.