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An opening of one to five inches in the car windows of smokers which becomes the easiest way to spot a smoker while driving. They are specially easy to spot in times of bitter cold, rain and other types of weather that would not usually permit the crackage of car windows.
"Hey man, look at that fool with their window cracked. It's like 3 degrees outside!"

"They're smoking man. It's just a smoker crack"
by Bryn B. February 19, 2008
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