lefty(POLITICS)informal mainly UK

SMART Vocabulary: related words and phrases

Political movements & groups
alt-right
ANC
anti-Bolshevik
anti-Bolshevism
anti-capitalism
big tent
black bloc
Blairite
Blue Dog
leftism
leftist
leftward
lefty
sectarian
sectarianism
segregationist
Sinn Fein
Sovietism
the awkward gangidiom
the lunatic fringeidiom

left-winger | American Dictionary

left-winger
noun[ C ]
us/ˈleftˈwɪŋ·ər/
a person who supports the political left