1 definition by Allan A Dale

Top Definition
A tall tale.
A rhyming slang phrase dating back to Mediaeval times when Sir Guy of Gisburne spread unfounded rumours about Robin of Loxley (aka Robin Hood).
The phrase "You're telling a Gisburne" has been adulterated over the years, and its rhyming equivalent (a "Lisbon") has gained popularity wihtin cyber-space message boards.

"I don't believe you!! You're telling a lisbon!"
by Allan A Dale November 30, 2006
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