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1.
A Deranged welsh man, often sports a beard with glasses.

"wow is that a bear ?"
"no its endaf"
by foogoooo February 01, 2009
 
2.
A welsh insult deriving from ancient welsh folklore. An endaf is a disgusting creature that lurks in the dark, most of the time eating mold underneath cabbage plantations. It is the only creature horrendously grotesque enough to be classed as a runt in the animal kingdom. Do not touch its boils as it enjoys it.
"Hey you look bad today mate, bit of an endaf!"

"Ahaha maate i was so drunk lastnight i smashed an endaf!"
by Iddi October 13, 2013