aginer
(also agginer, ag'in'er, aginner)
/əˈɡɪnə/
noun
US
informal
A person who is against something; a person having a habitually negative attitude; one who opposes any change as a matter of principle.
Origin
From agin, regional and colloquial variant of again + -er.
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I'm an aginer when it comes to social justice. I want perks for me and mine. If a program is designed to help "others", I am against it.