A name that originated in Japan around the 14th centry. The name was originally a slang term for a male with a abnormally small (micro) penis. The name has also be associated with females that have had sex changes and became males, she males with a micro penis.
The man was surprised after receiving a blow job from a busty woman, when she removed her penis from her panties showing she was in fact an Efen.
by Yang Bumg December 19, 2016