The Collaborative International Dictionary of English v.0.48:

peckish \peck"ish\, a.
   Inclined to eat; hungry. [Colloq.] "When shall I feel peckish
   again?" --Beaconsfield.
   [1913 Webster]

WordNet (r) 3.0 (2006):

peckish
    adj 1: somewhat hungry
    2: easily irritated or annoyed; "an incorrigibly fractious young
       man"; "not the least nettlesome of his countrymen" [syn:
       cranky, fractious, irritable, nettlesome, peevish,
       peckish, pettish, petulant, scratchy, testy,
       tetchy, techy]