1937 E. Partridge 17/1 Arm, under the..2. No good: tramps' c[ant].
1958 F. Norman 31 I read no matter how bad the book and some are right under the arm, stand on me.
1963 18 Oct. 537/1 All that's under the arm (i.e. no good).
1971 D. J. Smith x. 60 Under the arm, not up to previous standards.