Chiefly British. a method or maneuver used to escape a difficult or embarrassing situation; cop-out:
The scoundrel has used that get-out once too often.
Idioms
3.
as all get-out, Informal. in the extreme; to the utmost degree:
Once his mind is made up, he can be stubborn as all get-out.
Origin
1880-85; noun use of verb phrase get out
Word Origin and History for as all getout
get-out
to indicate a high degree of something, attested from 1838.
Idioms and Phrases with as all getout
as all getout
To the ultimate degree, as in She made him furious as all getout. The American writer Joseph C. Neal had it in his Character Sketches (1838): “We look as elegant and as beautiful as get out.” Today it always includes all. [ ; first half of 1800s ]