Source : Webster's Revised Unabridged Dictionary (1913)

Overnice \O"ver*nice"\, a.
   Excessively nice; fastidious. --Bp. Hall. -- {O"ver*nice"ly},
   adv. -- {O"ver*nice"ness}, n.

Source : WordNet®

overnice
     adj : excessively fastidious and easily disgusted; "too nice about
           his food to take to camp cooking"; "so squeamish he
           would only touch the toilet handle with his elbow"
           [syn: {dainty}, {nice}, {prissy}, {squeamish}]