A response to a stupid action or insult.
Also used as a great way to imitate a stupid person
Response to stupid action:
*Caleb accidentally spills his drink*
Jon: "FUH FUH CALEB"
Response to a stupid insult:
Jon: "Hey Caleb, You're really dumb"
Caleb: "Fuh Fuh Jon...Fuh Fuh"
Imitating a stupid person:
Daniel: "FUH FUH MY NAME IS GUY DIMARCO FUH FUH"