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1.
A fuffer is a blanket. Can also be used as a verb meaning to cover with a blanket.
Father: "Are you ready to be tucked in yet? It's past your bedtime."
Child: "I can't go to sleep yet. I can't find my fuffer!"
Father: "Well I guess you'll have to deal with being fuffered with this blanket for tonight."
by Kerlack July 03, 2009
 
2.
The sound a dog makes when it chews on itself.
Dog, quite your fuffering!
by Cruella Deville November 10, 2003