Originally Posted by Mr. Hairy Legs

Fred is someone who meets at least one of these criteria:

-rides a cheap bike (if you mean used vintage CL find)
-rides an expensive bike, slowly (if you mean used CL find)
-has hairy legs (my nickname is Sasquatch)
-wears normal clothes while riding (REI Cycling Underwear FTW!)
-is carrying anything with him, in panniers, backpack etc. (I do this even when I am not on a bike)
-rides to work (my bike is my car)
-uses fenders (Hell yes)

In short, any man riding a bike for any _practical_ purpose is a Fred.