Meaning
What does HYPERBRUH mean?
HYPERBRUH is a variant of the original emote cmonBruh, created for the streaming website Twitch.tv.
It features the face of a black person with a close shot of his face painted red showing confusion/astonishment with glowing eyes, to make it more intense than the original one.
The emote can be used to react to a situation which can be deemed racist, created by either the streamer or the viewer on Twitch.tv in the chat room of given entrepreneur, while they are doing a live broadcast.
Origin
What's the origin of HYPERBRUH?
The origin of the emote/reaction image is unknown on the internet, but it is mentioned by multiple sources like Reddit or the Urban Dictionary, that it was sampled from a picture of someone who is/was part of the Twitch.tv staff.
The variant HYPERBRUH was uploaded to the FrankerFacez collection in late-2017, which can be obtained by installing the browser extension.
Spread & Usage
How did HYPERBRUH spread?
Since it is a variant of an emote that is used to react to controversial topics/situations, it is a daily driver on Twitch.tv.
As of 10/12/2019 according to the website StreamElements, HYPERBRUH is the 30th on the list of most popular/used emotes on the website Twitch.tv, making it one of the more popular emotes.

External resources
- Know Your Meme โ Hyperbruh