grumbler β A person who persistently grumbles; a complainer.
grouch β to be sulky or morose; show discontent; complain, especially in an irritable way.
complainer β A complainer is someone who complains a lot about their problems or about things they do not like.
whiner β to utter a low, usually nasal, complaining cry or sound, as from uneasiness, discontent, peevishness, etc.: The puppies were whining from hunger.
wailer β to utter a prolonged, inarticulate, mournful cry, usually high-pitched or clear-sounding, as in grief or suffering: to wail with pain.
objector β anything that is visible or tangible and is relatively stable in form.
protester β an expression or declaration of objection, disapproval, or dissent, often in opposition to something a person is powerless to prevent or avoid: a protest against increased taxation.
belly-aching β Informal. a pain in the abdomen or bowels.
crab β A crab is a sea creature with a flat round body covered by a shell, and five pairs of legs with large claws on the front pair. Crabs usually move sideways.
crybaby β If someone calls a child a crybaby, they mean that the child cries a lot for no good reason.
faultfinder β a person who habitually finds fault, complains, or objects, especially in a petty way.
malcontent β not satisfied or content with currently prevailing conditions or circumstances.
wimp β any of a group of weakly interacting elementary particles predicted by various unified field theories, as the W particle and Z-zero particle, that are characterized by relatively large masses.
critic β A critic is a person who writes about and expresses opinions about things such as books, films, music, or art.
sissy β Disparaging and Offensive. an effeminate boy or man.
softy β a person easily stirred to sentiment or tender emotion.
grinch β a person or thing that spoils or dampens the pleasure of others.
stick in the mud β someone who avoids new activities, ideas, or attitudes; old fogy.
killjoy β a person who spoils the joy or pleasure of others; spoilsport.
sulker β to remain silent or hold oneself aloof in a sullen, ill-humored, or offended mood: Promise me that you won't sulk if I want to leave the party early.