Green’s Dictionary of Slang

splosher n.

[? var. on slapper n.2 (1)]

1. constr. with old, an unattractive woman.

[UK]Observer 14 Aug. 21/2: Bit of a Doris, trout, old stinker, old splosher — unattractive women.

2. a young woman.

[UK]N. Barlay Crumple Zone 50: She should get her hair fixed, get new clothes, get a life the crusty splosher.
[UK]J.J. Connolly Layer Cake 44: You ain’t out spunkin your dough down the clubs trying to impress some old sploshers.