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2.
A degree of coldness below about 40 degrees.
It's colder than a welldigger's ass outside.
by arrow_keys September 15, 2005
 
1.
Older slang, used in cold weather to place emphasis on how extremely cold it is outdoors.
Damn, it's colder than a well-digger's ass!
by Rod Brock July 31, 2006