Fuming is a state of furious anger. It's roots trace from how cartoons are depicted to have steam to come out their ears when they get angry or annoyed, often turning redin the face.
J: "I really don't see the point in fumping!"
A: "I heard Kiki was fumped by Cedric the other day. Poor her."
J: "What an asshole. But what did you expect from a frat boy such as him..."
When something has annoyed you so much that you begin complaining, and your voice goes high-pitched and squeaky. It may involve loud sounds of irritation being produced as a result of this 'fuming' state.
Asha was so fuming yesterday, she said someone stole her carpi-sonnes. She made those weird sounds again, when she spoke.