A cardigan worn by men. Many consider this an essential piece of clothing to be worn at all times. It has a cult following in Oxford, where it's use has been pioneered by none other than J-Clay himself.

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A cardigan worn by a male, with varying degrees of fabulousness.

Worn by that friend you aren't quite sure of; the mardigan says "I'm not dangerous" to the ladies, at the expense of saying "hey sailor" to the boys.
The aspiring metrosexual should be well equipt with a mardigan.