A breh is
one who is always on the receiving
end, and, unlike a brah or a bro,
never gives, contributes, or takes one for the team.
Tom, Dick, and Harry are best friends.
Tom is a brah, because he buys shit for Dick & Harry.
Dick is a bro, because even though he takes
Tom's shit, he lets Tom & Harry chill in his pool.
Harry is a breh, because he takes Tom's shit, never brings his own towel to Dick's pool, and has a curfew, which is lame.