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.