From a compound of therion and machomai; to be a beast-fighter (in the gladiatorial show), i.e. (figuratively) to encounter (furious men) -- fight with wild beasts.
KJV: If after the manner of men I have fought with beasts at Ephesus, what advantageth it me, if the dead rise not? let us eat and drink; for to morrow we die.
NASB: If from human motives I fought with wild beasts at Ephesus, what does it profit me? If the dead are not raised, LET US EAT AND DRINK, FOR TOMORROW WE DIE.