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!
από Rod Brock 31 Ιούλιος 2006
A degree of coldness below about 40 degrees.
It's colder than a welldigger's ass outside.
από arrow_keys 15 Σεπτέμβριος 2005