wingnut /ˈwɪŋˌnʌt/ noun4 •(informal, disapproving) A person who is or seems odd, eccentric, or crazy; especially, someone with bizarre or extreme political views.He was elected, wingnut raised and corn fed / Teabags dragging on the chamber floor / He did what he had to do to get southern boys to vote for you / To grease the wheels to get you in the door — 2014 •A deciduous tree of the genus Pterocarya native to Asia. •(informal, slang) A person with large ears. •(slang) A member of the air force (in a town that hosts a USAF installation). formswingnuts