keep one's eyes peeled

Etymology
US, 19th century. probably refers to keeping one's eyelids retracted.

Verb

 * 1)  To be on the alert, to be watchful.

Translations

 * Danish: holde øjnene åbne
 * Finnish: pitää varansa,
 * French: être attentif, être vigilant, être sur ses gardes
 * German: die Augen offen halten
 * Italian: tenere gli occhi ben aperti
 * Polish: mieć oczy dookoła głowy, ,