Keep somebody on their toes
Definition 1 of 1
Pro Tip 1/3Situational Alertness
Used when someone needs to react quickly to changing situations. 
An emergency room nurse must always be kept on their toes.
Pro Tip 2/3Active Engagement
Suggests someone is being encouraged to stay actively involved or interested. 
This challenging puzzle will keep you on your toes.
Pro Tip 3/3Positive Pressure
Implies a sort of beneficial stress that promotes personal growth or improvement. 
I like working on tricky projects; they keep me on my toes.
Never forget "Keep somebody on their toes"
Humans forget easily. That's why you should download WordUp: Smart reminders, word games, AI practice, and much more!
WordUp Chrome Extension
As you browse the web instantly look up words you don’t know.
Get Chrome Extension