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A word used to describe a person who is terrible at something. Often the person calling someone else a legit scrub is actually a legit scrub themselves.
Steve "Wow you can only run this obstacle course in 18 seconds, your a legit scrub."

Gary "Wow not only do you care about an obstacle course time but you used the phrase legit scrub. You sir are the legit scrub."
by PotomacThug September 01, 2010
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