The term 'Band of Brothers' can be summarized by two crossword solutions: FRAT and GIBB. FRAT is an acronym for 'FRATERNITY, ' which is a social organization of male students at a college or university. GIBB is an acronym for 'Gibb Brothers, ' which refers to the three brothers who formed the popular music group, the Bee Gees. The Bee Gees were known for their disco-influenced pop music in the 1970s and 1980s. Together, these two solutions represent the idea of a 'Band of Brothers, ' which is a phrase used to describe a close-knit group of people who share a common bond.