CiNo will remain an intricate, raw rhymer (tight) until he dies. A “virgin” pussy is tight because it has never been penetrated, and to KEEP it that way the woman must remain celibate, which is the oath of not having sex.
CiNo also adds “Rookie” to the end of the line to emphasize on his opponent being a beginner (this is contrasted with being a virgin, never having had sex).