You play Roblox with friend and your idiot brother joins silently and someone else kills him, he screams and rages because he’s a little brother, then mom makes you get off and let’s bro stay on
A male who has a preference for platonic "fraternal sibling" relationships with women as opposed to sexual relationships.
The "little brother" may not necessarily reject a sexual encounter with a woman with whom he has developed a "fraternal sibling" relationship, but it is not the primary motivation for initiating or continuing the relationship and generally not the desired outcome.