Muni
"Muni" is a common abbreviation for "municipal", and sometimes becomes a frequently-used name for a city-related service or organization:
A muni is a mountain unicycle.
Paul Muni (1897-1967) was an American actor.
Masaryk University Brno[?] is often abbreviated to "Muni".
Rio Muni[?] was a Spanish colony that is now part of Equatorial Guinea.