fighter's flu
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."
John- "That's what he said last time. He always gets the fighter's flu and doesn't show."