Top definition
A driving maneuver that when turning right or left onto a two lane street you drift into the far lane instead of staying in the closest lane.

Named after the city of Waterloo where the frequency of this idiotic maneuver is rampant.
I was turning left onto a two lane street and some idiot turning right at the same time pulled a Waterluian and almost sideswiped me.
by viverant August 27, 2009
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