Bro

Bro was a slang term that was short for "brother" and was used to refer to a male friend or acquaintance.

In 2382, fortunately for Brad Boimler, Commander Jack Ransom interceded, saying that "[his] bro [was] ignorant of [their] ways", and that "He did not mean to offend." (LD: "The Best Exotic Nanite Hotel")