bo-peep noun 3verb 1forms 3 noun3 •The act of looking out suddenly, as from behind a screen, so as to startle someone (as by children in play), or of looking out and drawing suddenly back, as if frightened.That such a king should play bo-peep, / And go the fools among. — 1603 •(slang) Sleep.Well, come on, boys. You've got to push off now. I'm going to read me linen and then get some Bo-Peep. — 1976 •Any whistling frog. verb1 •To play the game of bo-peep; to peek out suddenly. formsbo-peeped · bo-peeping · bo-peeps