But without more context, it's tricky. I should probably address that the term is unclear, then offer interpretations. Maybe the user intended to write "self-sufficiency" and there was a typo. But "selfsuck" makes me think of negative connotations like narcissism. Alternatively, in some contexts, "suck" can be a prefix in slang, like "self-suck" as in self-preservation but in a negative way.