This string looks like a stylized or "leet speak" version of the Italian title for the movie/book The Martian : (meaning "Survivor - The Martian").
The version you shared, S0pr4vv1ssvt0_Th3_M4rt , uses common character substitutions to bypass filters or create a unique username/tag: for o 4 for a 1 for i 3 for e v (in the context of vt0 ) for u Sopauvissuto_The_martian_S0pr4vv1ssvt0_Th3_M4rt...
It is essentially a "leet" (1337) translation of the Italian release title for the story of Mark Watney's survival on Mars. This string looks like a stylized or "leet