Green’s Dictionary of Slang

outer n.2

(UK Und.) a pocket.

[UK]F. Norman in Sun. Graphic 23 Nov. in Norman’s London (1969) 39: He might therefore stick his fork into some unsuspecting guest’s outer.

SE in slang uses

In phrases

on the outer (adj.) (also on the outers) [SE outer, the part of a racecourse outside the enclosure]

(Aus../N.Z) unpopular, out of favour, penniless or destitute.

[Aus]G.H. Lawson Dict. of Aus. Words And Terms 🌐 OUTER, ON THE – To be poor; to be outside.
[Aus]K. Tennant Battlers 279: He was outside all that, ‘on the outer’, as they would say.
[NZ]G. Slatter Gun in My Hand 230: I’m on the outer as usual and Annie wouldn’t speak to me in the hospital.
[Aus]A. Buzo Rooted III iii: I’m already on the outer with Mum, as it is.
[Aus]D. Ireland Glass Canoe (1982) 73: Sometimes a woman on the outer with the Great Lover would approach old Tom, who would promise to get her back into favour.
[SA]B. Simon ‘Outers’ Born in the RSA (1997) 409: richard: Are you on the outers? hennie: Hey! My buddy – what else?
[NZ]McGill Dict. of Kiwi Sl. 80/2: on the outer out of favour, perhaps rejected, or penniless; from the outer enclosure at a racecourse.
[Aus]G. Disher Deathdeal [ebook] ‘It wouldn’t look good. They’re trying to build up a team spirit and I’d be on the outer if you were there’.
[NZ]McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
[Aus]D. Whish-Wilson Shore Leave 96: He was now on the outer and needed a way back in.