Bro

Bro is short for "brother," which may be an actual blood brother or brother-in-law. Guys also commonly use it to refer to a close male friend.

When used with family members, bro is a straightforward abbreviation that simply refers to a brother. For example, you may text your brother, "Hey bro. You coming to mom and dad's this Sunday"

However, guys also use bro to refer to close male friends with no family ties (sometimes called a bromance). In these cases, the guys are typically young (in their teens or twenties), into sports and partying, and looking to pick up women. Common bro stereotypes are fraternity brothers, surfers, and sports teammates.

For many, these types of bros conjure up negative connotations that all bros are muscular and unintelligent. However, it's never wise to assume who is and isn't a bro since bros come in all shapes and sizes and are not limited to a specific type of male.