Top definition
A male friend who you would never in a million years consider dating, fantasize sexually about of ever contemplate physical interaction with; however, to the public, you are in a constant state of flirt with him.
Boyfriend: "Why were you sitting on his lap and holding his hand and whispering in his ear all night?"
Girlfriend: "Relax, babe. He's like my gay brother."
by FrustratedChick August 16, 2011
Get the mug
Get a gay brother mug for your sister Beatrix.