'Bruh moment' is a blanket term for all situations that merit a reaction, whether that be shock, awe, or any other strongly felt emotion. In these such situations one must exclaim 'Bruh!', typically in a low tone of voice. Typically only men will exclaim using the word 'bruh', however, the S.O.B. (Society of Bruh) is a progressive union full of verified gamer bros and care not whether man nor woman exclaims with the word 'bruh'.
The reaction to every single situation possible. The most versatile word in existence. Can be used to show happiness, sadness, distress, anger, fear, sleepiness, disgust, approval, disapproval, confusion.. and many more!
Example 1-
Girlfriend- Omg I'm preggo!!
Boyf- Bruh
Example 2-
Man- Dude I need to borrow some more money I'm broke.
Other man- Bruh