UCU can refer to different things depending on the context. Here are some possible meanings:

• University and College Union: UCU is a British trade union in further and higher education that represents over 120,000 academics and support staff. It was formed in 2006 by the merger of two other trade unions: the Association of University Teachers (AUT) and the National Association of Teachers in Further and Higher Education (NATFHE).

• University Credit Union: UCU is a financial cooperative that serves university communities in California. It was founded in 1951 on UCLAs campus and offers products and services designed specifically for the university community, such as checking accounts, loans, and credit cards.

• Other meanings: UCU can also stand for other things, such as Universidad Católica del Uruguay, Urban Conservation Unit, or Union des Coopecs Umutanguha, among others.

Without more context, it is impossible to determine which UCU is being referred to.