Reverse Dictionary: INCREDIBLE

ADJECTIVES
ANCHOR SPREADABLE incredible → 2016 Cockney rhyming sl. (Bk.)
BEYOND THE BEYOND unexpected, incredible, out of the way → 1898 N. Ireland (Bk.)
BEYON’-THE-BEYONT quite incredible; quite out of the way → 1911 Sc.  (Bk.)
OUT OF ALL REASON quite absurd or incredible → 1887 Sc.
TERATICAL relating to marvels or prodigies; incredible, wonderful, miraculous → 1722
UNBELIEFFUL incredible ..1388 obs.
UNBELIEVED unbelievable, incredible → c1425 obs.
UNCREDIBLE very great and incredible → c1440 obs.
UNDEEMIS ► UNDEEMOUS ► UNDOMIOUS UNDOOMIS UNDUMIOUS UNDUMOUS unparalleled, extraordinary, remarkable, incredible, esp. of size or amount, inconceivably large, immense, incalculable → a1300 Sc. & N. Eng. dial.
UNLEFLICH incredible → a1225 obs.

NOUNS
LATA anything incredible (pronounced ‘lah-tah’) → Amer. World War I sl.
ONE FOR THE BOOK anything noteworthy, remarkable, or incredible; something worthy of long-term record → 1920s US sl.

NOUNS – PERSON
MIND-BLOWER an incredible or fantastic person → 1968 sl. 

PHRASES
► THAT’S CLOSE that’s untrue, incredible; that’s unbelievable → 1970 US students’ sl. (Bk.)