Clue-by-four [Usenet: Portmanteau, Clue + Two-by-four] The Notional Stick With Which One Whacks An Aggressively Clueless Person.

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clue-by-four

[Usenet: portmanteau, clue + two-by-four] The
notional stick with which one whacks an aggressively clueless
person. This term derives from a western American folk saying
about training a mule "First, you got to hit him with a
two-by-four. That's to get his attention." The clue-by-four is a
close relative of the LART.

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