Brahms is a replacement for certain words that have lost their meaning. Brahms replaces words such as Bro, Dude or Man. It is used because these words are no longer able to represent the closeness between any two individuals.
The word stems from the German composer Johannes Brahms, it is used as a replacement word because Brahms on some smart phones was the auto-correct of Bro.
Variations of the word include Broham and Brohemians.
Broham 1: 'Hey Brahms did you get the poptarts?'
Broham 2: 'Yeah Brahms'