A person who constantly swerves from left to right while slowly walking on the sidewalk. This behavior often results from a preoccupation with a cell phone, gaping at skyscrapers, or a general lack of awareness.
Windy City Drifters are commonly encountered in crowded areas of Chicago and block the path of walking pedestrians. They have the greatest impact on foot traffic during rush hour but are an annoyance at all times of the day.
It took forever to walk from the train to the office today. There were windy city drifters everywhere. I felt like punchin' someone in the back of the head.