adjective [ only before noun ]
1.
having paid all the money necessary to be a member of a club or an organization :
a fully paid-up member
2.
( BrE , informal ) strongly supporting sb/sth :
a fully paid-up environmental campaigner
adjective [ only before noun ]
1.
having paid all the money necessary to be a member of a club or an organization :
a fully paid-up member
2.
( BrE , informal ) strongly supporting sb/sth :
a fully paid-up environmental campaigner
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005