RM, rm, or R&M may refer to:
RMS Lancastria (later HMT Lancastria) was a British Cunard liner requisitioned by the UK Government during World War II.
Kim Nam-joon (Hangul: 김남준; born September 12, 1994), better known as RM (formerly Rap Monster), is a South Korean rapper, songwriter, and record producer.
The RMS Queen Mary is a retired British ocean liner that sailed primarily on the North Atlantic Ocean from 1936 to 1967 for the Cunard Line – known as Cunard-White Star Line when the vessel entered service.