The definition of brer is a word used to mean brother, particularly in the southern parts of the United States.
An example of brer is Casey Affleck to Ben Affleck.
See br'er in Webster's New World College Dictionary
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noun
Browse entries near br'er
bpm
BPOE
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bp.
Bq
bra burner
Brabant
brabble
brace and bit
brace root