Reverse Dictionary: PESSIMISM

ADJECTIVES
1952 — DOWNBEAT gloomy, subdued, pessimistic → Amer. sl.

NOUNS
..L19 — CALAMITY HOWL a statement of extreme pessimism → US sl.

NOUNS – PERSON
1628 — MOANER a complainer or fault-finder; a whinger; a pessimist → colloq.
1804 — GLUMP a sulky, sullen, morose person; an irritable or gloomy person; a pessimist → Sc. & Eng. dial.
1865 — CROAKER a pessimist → US Civil War usage
1865 — GROWLER a pessimist → US Civil War usage
1873 — GUMMIDGE a peevish, pessimistic person; the complaints of such a person
1879 — WET BLANKET a person who dampens and smothers all enthusiasm; a person who prevents fun; a killjoy; a pessimist → Amer. sl.
1904 — GLOOMY GUS a very unhappy, sad, dismal, or gloomy person; a pessimist → US sl.
1910 — ADAM SOURGUY a sour-tempered pessimist → US theatre sl.
1917 — GLUM-POT an irritable, gloomy, or glum person; a melancholy or ill-tempered person; a pessimist → US sl.
1918 — CALAMITY JANE a nagging woman; a pessimist; a worrier; a prophet of disaster → US sl.
1921 — CRAPE-HANGER a killjoy; a pessimistic person → US sl.
1923 — GLOOM BUG a depressed person; a chronically gloomy person; a pessimist → US sl.
1927 — JOY-KILLER a pessimist; a person who fusses or worries a lot, esp. about trivial things → Amer. dial.
1940 — LAZY-ASS SACK OF SHIT a miserable, pessimistic, morale-lowering person → sl., orig. US
1940 — SORRY SACK OF SHIT a miserable, pessimistic, morale-lowering person → sl., orig. US
1943 — SAD SACK OF SHIT a miserable, pessimistic, morale-lowering person → sl., orig. US
1945 — DEAD BATTERY an irritable or gloomy person; a pessimist → World War II Amer. sl.
1945 — GLOOM PAN an irritable or gloomy person; a pessimist → World War II Amer. sl.
1945 — GLOOM PUSS an irritable or gloomy person; a pessimist → World War II Amer. sl.
1945 — GLOOMY PAN an irritable or gloomy person; a pessimist → World War II Amer. sl.
1945 — GLUM PAN an irritable or gloomy person; a pessimist → World War II Amer. sl.
1945 — GLUM PUSS ON A HOLIDAY an irritable or gloomy person; a pessimist → World War II Amer. sl. 
1947 — WEARY WILLIE a person who is perpetually tired, sad and pessimistic → US sl.
1950 — ‘APPY DAY a miserable, pessimistic type, a grumbler of the worst kind → Royal Navy sl. (Bk.)
1958 — BIRD OF ILL OMEN a person associated with bad news; a bringer of bad news; one who augurs ill, always predicting the worse possibility → Eng. sl. (Bk.)
1960 — BAD NEWS a pessimist → sl., orig. US
1962 — MOANING MINNIE a person who is pessimistic and always complaining; a persistent grumbler → colloq.
1975 — SAD APPLE a gloomy person, frequently irritable, introverted, or pessimistic; usually a person unnoticed socially; a drip → Amer. sl. (Bk.)
1989 — NEGAHOLIC a person with a compulsion to be negative; a pessimist → US sl.
2000 — NEGATIVE NANCY a female pessimist → US students’ sl.

VERBS
1862 — PESSIMIZE to make the worst of; to take the most unfavourable view of; to hold pessimistic views