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1.
One who is both smug and a weasel.

People of this ilk take great pleasure is possessing these characteristics because they are smug weasels.

Jaycob Mullingham Turner III of Chelmsford Chelmsfordshire is the only known living example of a Smeasel.
'That guy Jake has such and smug face and the personality of a weasel'

'Yeh, that's why they call him Smeasel'
by Wickery January 16, 2014