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third-person singular simple present thrashes out, present participle thrashing out, simple past and past participle thrashed out
(transitive, idiomatic) To discuss something so fully as to resolve a problem or conflict; to hammer out. quotations examples
It's important to understand that all lesbians of color do not feel the same way on all issues. Thrashing things out is not divisive. It's respectful.
1989 April 15, Angela Bowen, “Towards a National Lesbian Conference”, in Gay Community News, page 3