get-out (n.)youdaoicibaDictYouDict[get-out 词源字典]
also getout, figuratively indicating a high degree of something, by 1838, colloquial, from get (v.) + out (adv.). Verbal phrase get out as a command to go away is from 1711, but sense connection is not clear.[get-out etymology, get-out origin, 英语词源]