interjection. Sproingy cartoon sound made by suddenly erect nipples (or other fun appendages).
Real citation: "When you get a funnie feeling in your cat-box and/or you get COLD! your nipples go wa-boing!"
(anna and crystal, Jan. 15, 2003, "nipping out," http://www.urbandictionary.com/define.php?term=nipping+out)
Made-up citation: "With the Alaska-level air conditioning in this office, it's a wa-boing-a-palooza today."