Dick-a-boo involves at least two participants, male or female. Simply, this is
when you tease your partner(s) with your midsection by having them stare towards
the direction of your genitals and say "dick" shortly before you quickly, but
cautiously, unzip your pants and allow your erection to penetrate the opening of
your pants and startle your partner. This sexual game is not recommended for
males with a below average sized penis, as the startle factor greatly reduces
with penis size.
was able to maintain her composure after being startled by Ken's enormous
plastic erection bursting through the opening of his unzipped pants.