Source : Webster's Revised Unabridged Dictionary (1913)

Fussiness \Fuss"i*ness\, n.
   The quality of being fussy.

Source : WordNet®

fussiness
     n 1: an irritable petulant feeling [syn: {irritability}, {crossness},
           {fretfulness}, {peevishness}, {petulance}, {choler}]
     2: unnecessary elaborateness in details