E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
To look at. As a specimen of the ingenuity of certain etymologists in tracing our language to Latin and Greek sources, may be mentioned Mr. Casaubons derivation of peep from the Greek opipteuo (to stare at). (Pe-pe-pe bo!)
Playing bo-peep or peep-bo. Hiding or skulking from creditors; in allusion to the infant nursery game.