Literally this means "in the fight". This is used by people in Latin America; in particular Puerto Rico, The Dominican Republic, and Cuba.
People use this to describe their daily struggles, in particular in regards to overcoming financial difficulties. When you are "en la lucha" life is difficult, and you are fighting to win.
literally meaning "in the fight" it is slang in the underground homosexual community of Cuba referring to a male prostitute. someone who is "en la lucha" is a male prostitute. the noun for a male prostitute in the Cuban gay underground is "luchador" (fighter).
él está en la lucha - he's a prostitute, literally, he's in the fight or
él está un luchador - same, literally, he's a fighter
