To urinate. Masculine derivative form of the longer "winkie-tinkie" used by Madeline Kahn's character Trixie Delight in the 1973 Peter Bogdanovich film PAPER MOON.
"I really need to go winkus before I go blind."
by Craig Duckett December 05, 2003
Winkus - (n.) 1. A winking anus; the rapidly fluctuating aperture of an anus in turmoil. 2. Ned Cannon
To hearty cheers from all involved, the winkus erupted, spraying fecal matter against the faux leather seat of the Ford Taurus.
by Horus Perineum, PhD April 11, 2003