pettishly

from WordNet (r) 3.0 (2006)

pettishly
    adv 1: in a petulant manner; "he said testily; `Go away!'" [syn:
           {testily}, {irritably}, {petulantly}, {pettishly}]

from The Collaborative International Dictionary of English v.0.48

Pettish \Pet"tish\, a. [From {Pet}.]
   Fretful; peevish; moody; capricious; inclined to ill temper.
   "A pettish kind of humor." --Sterne. -- {Pet"tish*ly}, adv.
   -- {Pet"tish*ness}, n.
   [1913 Webster]