Brotherly love is a strong bond of affection between siblings, and it can be expressed in many different ways. AGAPE is a Greek term for unconditional love, which is often used to describe the love between family members. MANCRUSH is a slang term that refers to an intense admiration or infatuation with another person, usually a male. Both AGAPE and MANCRUSH are terms that can be used to describe the strong bond of brotherly love.