CONSERVATIVE
ADJECTIVES
1680 — MUMPSIMUS stupidly conservative
1857 — HUNKERISH conservative, old-fashioned → US colloq.
1858 — HARD-SHELLED conservative, straitlaced; unyielding; hard-hearted → Amer. dial.
1870 — HARDPAN conservative, basic, fundamental → Amer. dial.
1900 — HARD-SHELL conservative, straitlaced; unyielding; hard-hearted → Amer. dial.
..20C — DAGGY conservative and lacking style and sophistication in manners, interests, etc.; uncool; unfashionable in dress → Aust. sl.
1910 — SAFE AS KELSEY extremely conservative → sl.
1936 — STICK-IN-THE-MUDDISH conservative, conventional → sl.
1946 — SQUARE conservative, conventional → sl., orig. US
1959 — BUTTON-DOWN having or characteristic of a conservative or conventional attitude or appearance; staid, formal, repressed → US
1960 — BUTTONED-DOWN having or characteristic of a conservative or conventional attitude or appearance; staid, formal, repressed → US
1960 — STRAIGHT conservative, conventional → sl., orig. US
1960 — WAY-IN conservative, conventional → sl.
1970 — RED conservative, straitlaced → US students’ sl.
2000 — LAME old-fashioned and overly conservative or conventional → African-American sl.
NOUNS, PERSON
1733 — STICK IN THE MUD a dull, conservative person → US sl.
1834 — YOUNG FOGEY a young person of conservative or outdated tastes, attitudes, or appearance
1849 — HUNKER a conservative, one opposed to innovation or change → US political usage
.M19 — FOOZLE a conservative, one who is behind the times; a gullible fool → sl.
1858 — HARD-SHELL a person holding conservative or strict views; an obstinate or uncompromising person; a conservative or straitlaced person; one who is unyielding or hard-hearted → US
1860 — SHELLBACK an ultra-conservative, slow-witted person → US sl.
1865 — MOSSY-BACK an old-fashioned or politically conservative person
1873 — MOSSBACK an extreme conservative; a reactionary
1886 — DODO an intensely conservative or reactionary person who is unaware of changing fashions, ideas, etc. → colloq.
1934 — COLONEL BLIMP a very conservative man; someone with reactionary views → sl., derogatory
1934 — MOSSHEAD a diehard conservative → US sl.
1945 — ICKY a conservative person → jive usage (Bk.)
1949 — MOLDY FIG • MOULDY FIG a person having conservative or outdated ideas → Amer. sl.
1957 — CUBE an extremely conservative or conventional person → sl., orig. US
1966 — DAG a person who is conservative and dull; a person who has no sense of fashion; an uncool or unhip person → Aust. sl.
1970 — DUSTY BREAD a conservative, conventional woman →African-American sl.
1970 — HARDHAT a conservative person, a reactionary; a person who is actively and outspokenly opposed to nonconformists → orig. & chiefly US
1974 — TACK a conservative person → African-American sl.
1990 — FART-HEAD a conservative, traditional old person → sl.
VERBS
1913 — HOLD CLOSE TO THE WILLOWS to act conservatively and cautiously; to be conservative, conventional, or modest → Amer. dial.
Lexicophilia 