Peeka-no.
A verbal expression of annoyance over the patronising, imbecilic nature of parents who believe that holding their hands over their face immediately turns them invisible, and that removing their hands and then proceeding to say peekaboo, will amaze and shock the audience (often young children) into believing their parents are talented magicians who have an unbelievable power to disappear off the face of the Earth and then miraculously reappear.
