One's colleague ("brother" in the same craft, occupation, or society).
My co-brethren of the quill.
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(India) One's wife's sister's husband.
My co-brethren of the quill.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.