The act of looking out suddenly, as from behind a screen, so as to startle some one (as by children in play), or of looking out and drawing suddenly back, as if frightened.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "bopeep" in a sentence
"All run-away sheep bound back bopeep, trailing their teenes behind them."
"But my opinion is that if you don't live with him, you had better live without him, and not go shilly-shallying and playing bopeep."
"There was a charming mixture of all that is needed to make a garden perfect -- grass, velvety lawn rather; water, for a little brook ran tinkling in and out, playing bopeep among the bushes; trees, of course, and flowers, of course, flowers of every shade and shape."