Region: General | Usage example: The fast pace of the meeting kept everyone on their toes.

Keep on your toes

Meaning

Stay alert and ready for action.

Used when people must be ready for quick changes.

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

Sports and dance metaphors about staying balanced on the balls of your feet.

Used in 20th-century training manuals and coaching notes.