Aeugh or Augh or Aegh is normally used when disgusted or when your mouth is full of food, it refers to the sound made by the viral pufferfish that is fed carrots. It's rapidly used by little kids when they first learn it.
Person 1: Aeugh
Person 1: Aeugh
Person 2: Bro, what's wrong with you?
A word used to express emotion without having to use any decent vocabulary.
Best said when you bring your lower jaw forward and raise your eyebrows, slightly tilting the head to one side.
It sounds a bit like the word 'oh', but there are different tones in the word, hence the unusual spelling. It must be said: a-ee-iu-oo.
"Aeiugh my goodness!"
"Hey, how are you?" "Aeiugh."
"Wow look at this prettyflower... AEIUGH it pricked me!!"
You can replace the sound 'oh' with 'aeiugh' in almost any word, e.g.
Laeiughl (instead of lol)
Hellaeiugh (instead of hello)
Neiugh!!!! (instead of no!!!! - notice how the 'a' is dropped, purely because it seems more correct)