Top Definition
An internet forum troll of Irish descent with a particular penchant for baiting moderators.
Best known for 1 liners and smilies, a zehner will one minute be your friend, the next stab you in the back. A zehner is bad.
zehner can also be used as a verb.
verb: to zehner...Don't zehner the forum you Irish prick.
noun: He's a right tossing zehner, should be banned.
by TD300 January 09, 2009

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