1. Directions given that end up being incorrect or roundabout.

2. Placing one's buttocks on the car steering wheel, and using this as a method for navigating the car.
"Let me tell you the way" Bob said. Five minutes later, when Bob led them down a dead end street, he realised he'd taken his party on a bit of a bumsteer.


by lauzypants April 1, 2009
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A little steer given from behind to manipulate or confuse, A prank.
I was told to come to this adress for the party but no one's home, what a bumsteer.
by Mike January 11, 2005
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