keep somebody on their toes

US /kiːp ˈsʌm.bə.di ɑn ðer toʊz/
UK /kiːp ˈsʌm.bə.di ɑn ðer toʊz/
"keep somebody on their toes" picture
1.

manter alguém alerta, manter alguém atento

to make someone stay active and concentrated

:
The challenging project really kept us on our toes.
O projeto desafiador realmente nos manteve alertas.
Our boss likes to keep us on our toes with unexpected tasks.
Nosso chefe gosta de nos manter alertas com tarefas inesperadas.