bellyacher
complainant
complainer
crab
crank
croaker
faultfinder
frondeur
griper
grouch
grouser
growler
grumbler
kicker
kvetch
malcontent
mutterer
querulous person
reactionary
reactionist
rebel
sorehead
whiner
speaker
talker
utterer
verbaliser
verbalizer
Stu
acci
aimait
bagger
contaba
dialogo
encontrado
joie
muera
plaindre
presi
smiler
teman
vaisseaux
vulgar-minded
woman-hater