Irremplaçable means "irreplaceable." It's a strong adjective that emphasizes uniqueness and value, suggesting that something or someone cannot be substituted.
In the song, Dadju uses this word to tell his rival that the woman he's pursuing has realized her previous partner is not irreplaceable. He sings, "T'es pas irremplaçable" (You are not irreplaceable), highlighting the ex-partner's dispensability and setting the stage for him to step in.
In "KING," Dadju tells a story of a love triangle from a very confident perspective. He directly addresses a man who is neglecting his girlfriend, telling him to step aside because he's not up to the task. The singer sees himself as the "king" this woman truly wants and deserves. He points out that the other man is responsible for the distance in the relationship and is ultimately replaceable.
Dadju isn't just criticizing; he's making a promise. He positions himself as the one who will "repair" her and always be there when she calls. He declares he's not just a substitute but the new "starter" who will care for her as he would his own life. The song is a bold declaration of intent, with the singer ready to take over and provide the love and attention he believes the woman has been missing.