RINO

abbreviation or noun

ˈrī-(ˌ)nō 

plural RINOs

informal + disparaging

: a member of the Republican party who is disloyal to the party or insufficiently conservative : a Republican in name only

That led Mr [Donald] Trump to say she was "worse than a RINO," an acronym for "Republican in name only."

—Eric Garcia

For die-hard loyalists eager to see their party purged of any "RINO" elements, that might be a price worth paying.

—Philip Wallach

Any Republicans who fought him were labeled RINOs and many were knocked off in primaries, leaving a party in which the former president remains the dominant figure.

—Howard Kurtz

Word History

Etymology

Republican in name only

First Known Use

1992, in the meaning defined above