noun. A term describing acrobatic feats performed by the male genitalia, mainly the penis. A combination of the words penis and circus. Possible feats could include swinging the penis like a trapeze, making it go around in circles, or putting its head in a lion's mouth.
Jane: How was that date of yours last night?
Jane: How so? Was a penircus involved?
Mary: You betcha! It was a regular 3-ring penircus! I even had to buy tickets!