Guh is a word used in response to something good/cool/funny/positive that cannot elicit much in the way of words.
"Did you know that Pedophile got executed?"
'Guh'
Guh has many meanings. According to the r/Guh1 subreddit, the subreddit dedicated to the use of Guh, it is whatever you'd like it to be.
That being said, here's the actual meaning:
When you can't conjure up a reply, basically what people use "Yeah" "Yea" "Lol" and "Lmao" for.
Can also be used for anything weird.
"dad died after mom crushed his head between her thighs"
'guh'
-Meme image-
''guh''