The name applied to any child of an illegitimate
relationship, generally between two
rich celebrities. In almost all cases, the rubber has broken or the child is otherwise an accident during a small 3 week fling, and instead of just calling it a "bastard
baby", spindoctor's have coined the word "lovechild."
Did you hear about
celebrity "X" and "Y"? They got drunk one
night after a
big Hollywood party, one thing led to another and the next thing...."X" gave birth to a lovechild, who "Y" has not nor ever will care about or wish to see.