Reverse Dictionary: BACK OFF

NOUNS
1823 ► FUNKING a showing fear, nervousness, or cowardice; backing out of or evading something due to nerves, cowardice, etc. → colloq.
1903 ► CRAWL-OUT a back-out → US

NOUNS, PERSON
1860 ► CRAWFISH a person who retreats from or backs out of a position; a political renegade or turncoat → US colloq.
1905 ► CROAKER a person who backs out of an undertaking → Amer. dial.
1990 ► QUEEN WEEN a person who backs out of a commitment → US students’ sl.

VERBS
1746 ► FUNK to back out of something; to surrender in a cowardly fashion → sl.
1757 ► CRIMBLE to go back on an undertaking, to be cowardly
1844 ► CRAWFISH to back out of an agreement; to yield or back down from a position; to be evasive → Amer. dial.
M19. ► FLUMMOX → FLUMMUX to back out, to back out of a promise; to disappoint; to opt out of a round of betting → sl.
1859 ► FUNK OUT to back out of something, owing to a lack of courage or spirit; to try to avoid or evade an undertaking, duty etc. 
1863 ► BAG ONE’S HEAD to back off, to give in, to admit defeat → Amer. sl.
1871 ► JACK UP to back out or withdraw from a venture or undertaking; to give up, esp. suddenly or abruptly → colloq. obs.
1873 ► JACK → JAG to back out or withdraw from anything; to relinquish, to abandon, esp. to leave off or throw up work → Eng. dial.
1883 ► DUFF to back out or withdraw from a venture or undertaking; to ‘chicken out’ → Sc. & Eng. dial.
1897 ► CROW-HOP to back out of an agreement, commitment, etc. → Amer. dial.
1898 ► ARSE to back out of fulfilling a promise, etc.; to shuffle → Sc. (Bk.)
1899 ► ARSLE to back out of a place or situation → Amer. dial.
L19.. ► PIKE to back out; to hold oneself back → sl.
1913 ► RENIG to back out → Amer. dial. (Bk.)
1930 ► GO CHICKEN to back out; to be too frightened to act → sl., orig. US
1942 ► COP OUT to back out; to avoid one’s responsibility; to renege → Amer. sl. colloq. (Bk.)
1943 ► CHICKEN OUT to back out, to change one’s mind, to lose one’s nerve → Amer. dial.
1950 ► MUCKLE OUT to back out, to renege → Amer. dial.
1952 ► DINGO to back out of, to shirk → Aust. sl.
1967 ► PUSSY OUT to back down, to back out; to act like a coward → sl., orig. & chiefly US
1984 ► BAG ONE’S FACE to back off, to give in, to admit defeat → Amer. sl.