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1.
A pedestrian walking on a bike parth or on a bush track used by mountain bikers who are dozy, have a vacant expression, they are oblivious to their surroundings, with their mouths agape, they lack situational awareness.

when alerted to the presence of bike riders they always act like startled rabbits and step in front of the rider
I rung my bell but the gormless walker stepped right in front of my bike, she was a candidate for a darwin award.
by mountainbikeman June 21, 2010