Easily upset; given to bouts of ill temper: a fussy baby. Paying great or excessive attention to personal tastes and appearance; fastidious: He was always fussy about clothes. Calling for or requiring great attention to sometimes trivial details: a fussy actuarial problem. Full of superfluous details: "It can indeed be fussy, filling with ornament what should be empty space\u201d ( H.D.F. Kitto).