An expression used to express immense amounts of shock, disappointment, and frustration related to what someone has said or done. First used as a variant of bro, then popularized by a Vine clip in its current use.
Formal full form: With all due respect, what is this idiocy?
Formal
short form:
Brother, what have you just done/said?
Informal full form: Bro, what the fuck are you doing/saying?
Informal
short form: Bruh.
Example
1:
Person
1: Can you show me the US on this map?
Person 2: *points at Saudi Arabia*
Person
1: Bruh.
The crowd: Bruh.
Example 2:
Student
1: They marked me absent when I was present in class! I talked to the administration, and they said there'
s nothing they could do about it!
Student 2: Bruh. Truly an F moment.