"fuzzy about" is correct and usable in written English.
It is used to describe someone who is uncertain or unclear about something. For example, "John was feeling fuzzy about his decision to quit his job."
What could be fuzzy about an oil reservoir?
The doctor was fuzzy about how it would happen; almost everybody was fuzzy about the means to the end.
By then, of course, they will have gotten a little fuzzy about the details.
Even without government circumlocution, enough was fuzzy about the deal to have investors worried.
"Waco is not something that made us feel warm and fuzzy about A.T.F.," he said.
So it doesn't help when industry players are fuzzy about just which score they're talking about.
She says she was "a little fuzzy about whether there was any money or not.
But I'm still a little bit fuzzy about whether you would cut education aid.
Allow yourself to feel all warm and fuzzy about that, because the rest of the baseball news isn't.
Sure, Vick has earned this postprison comeback, but it's still tough to feel all warm and fuzzy about it.
Sure makes you feel all warm and fuzzy about how much N.F.L. teams value your fandom, doesn't it?
