naviguesser

noun - A person similar to a navigator, but who has either no idea of how to get to where one is going or only a vague idea, and they therefore attempt to give directions that are very bad or completely wrong.

Can also be used as a verb - navigeussing
Matt and Jim were trying to drive from LA to Ventura, but end up heading towards Bakersfield:

Jim "Did we miss the turn of for the 101? I thought you were paying attention to the signs."

Matt "Um, I thought we take the 5 all the way up.

Jim "Good job naviguesser, can't you use mapquest?"
by ahack March 04, 2009
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