John Carew faces teasing by team-mates - after having a tattoo that says he has monthly periods.
The Stoke City striker, 31, has the French slogan "Ma Vie, Mes Régles" inked on his neck.
It is supposed to proclaim 'My life, My Rules'.
"But it can be read as 'My Life, My Periods'.
Norwegian Carew, on loan from Aston Villa, also has the accent on the "e" the wrong way round.
Janine Avel, of Paris University, said: "Régles doesn't mean anything.
"Carew meant règles, the plural of rule. But it also means menstrual periods."
A club source said: "John's going to be the butt of dressing room jokes when the lads find out about this."
But Carew is not the only one to boob. David Beckham had his wife's name tattooed in Hindi script on his arm - spelled "Vihctoria".