替补情人

"Backup Lover" is translated from this Chinese net-name. It could refer to those in a relationship outside marriage while expecting an official status change once conditions permit, usually carrying a certain amount of insecurity or inferiority due to its non-primary nature. Such a title could either reveal self-mockery, irony, longing to gain official approval and status for a relationship, or even express contempt for the situation one is caught in.