The phrase "real fighter" refers to someone who is brave, resilient, and never gives up. It can be used to describe someone who faces challenges and difficulties with determination and strength. Full definition
She had seen real fights and real fighters before. (si.com)
«Banner's largest work to date, Harrier and Jaguar brings the highly - charged physicality of two real fighter jets, both previously in active military service, into the unexpected setting of the neoclassical Duveen Galleries. (theinspirationgrid.com)
the people depicted were real fighters on the genuine site of a battle. (petesgrillandpizza.com)