Top Definition
When a person claims to be a fighter and also that he or she is thinking about participating in a fighting sport, for example a jiu-jitsu tournament or a boxing match, but on the day of the event doesn't show.
Bob- "Where's Mike, he said he was thinking about competing."

John- "That's what he said last time. He always gets the fighter's flu and doesn't show."
by Bob's Chophouse July 26, 2009
5 Words related to fighter's flu

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