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