adjective

angry or dissatisfied.

judges receive letters from disgruntled members of the public

dissatisfied,discontented,aggrieved,resentful,fed up,displeased,unhappy,disappointed,disaffected,malcontent,angry,irate,annoyed,cross,exasperated,indignant,vexed,irritated,piqued,irked,put out,out of temper,sulky,sullen,petulant,peevish,grumpy,churlish,testy,peeved,miffed,aggravated,hacked off,riled,peed off,hot under the collar,in a huff,cheesed off,browned off,narked,eggy,not best pleased,sore,teed off,ticked off,vex,snuffy,pissed off,pissed