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1.
(mar-ee-oo-ing)
1. The act of walking in such a way that you drive the person you are walking next to off the sidewalk because you can't walk in a straight line.

2. The act of not being able to walk completely straight.
I had to walk ahead of everybody on the way to Taco Bell cuz Mario was MARIOING me.
by d-l-m December 05, 2010