Definition of aginer in English:

aginer

Pronunciation /əˈɡɪnə/

noun

(also agginer)
informal US
  • A person who is against something; one who opposes a proposal, course of action, point of view, etc. Also more generally: a person having a habitually negative attitude; one who opposes any change as a matter of principle.

Origin

Early 20th century; earliest use found in Westminster (Philadelphia). From agin, regional and colloquial variant of again + -er.