When two close female friends engage in sexual activity with one another's brothers. This occurs either out of genuine attraction to the friend's brother, or because the females are seeking revenge on one another, or from a quasi-lesbian desire to be with someone who resembles their best friend.
Susie made out with Denise's little brother on the party bus. Hard. Now, to get revenge, Denise is going to blow Susie's hot older brother in a Denny's parking lot.

They are now officially brother lovers.
by djleej September 4, 2012
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Refers to a 'white' female who only dates black men.
She is fine but i heards she's a brother lover.
by Chris the whiteman June 24, 2007
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A brother who fancies his own brother and often likes to put spy cameras where they know they will be naked or defecating.
He also likes to collect his brother and his girlfriends used condoms for their own purposes.
These individuals need locking up but may sneak a naked picture of their brother with them into jail, they must be cavity searched! although they imagine its their brother.
Dean: Where has my used condoms gone?
Mitch: I dont know *The brother lover Shoves condoms in his pocket*
by Azza310 May 7, 2006
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even worse than;

your mom gay
your dad lesbian
your granny tranny
your granpap a trap
and your sister a mister
combined
absolutely devastating consequences are braced when this statement is used
neil : dude your mom gay

kenneth : well your granny a tranny

steve emerging from the darkness : well, your brother a lover
*whole world collapses in on itself sucking in everything in its path planets removed with ease and now there is just darkness, with one emerging victor,,, steve*
by SteveDoigy0151 March 17, 2018
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The most devastating insult you could say to an individual. Worse than every insult known to mankind. Every time this is said to someone, that person will die.
Joe: Hey bro, ur mom gay.
Ken: ur dad lesbian

Joe: ur granny tranny
Ken: ur grandpap a trap
Joe: *takes a deep breath* ur brother ur lover
Ken: *explodes*
by bojack horse daddy March 15, 2018
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Nothing can stop this one.
You may use this in only the most dangerous moments to defeat the strongest enemies.
Kim : ur mom gay.
Dylan : no u.
Kim : ur grandpap a trap.
*Dylan starts sweating of fear*
Dylan : ur brother ur lover.
*The entire omniverse seizes to exist, all thats left is a spec of dust that starts big bang 2*
by CheffersonTheGreat March 17, 2018
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