trollies, n. — Green’s Dictionary of Slang

trollies n.

[Lancashire dial. trollys, a woman’s drawers, itself linked to Scot. trolly, any object with its length disproportionate to its width, ? ult. SE trail]

1. underpants.

1999

Roger’s Profanisaurus 3 in Viz 98 Oct. 9: cough your filthy yoghurt v. A romantic expression for ejaculation. A money shot (qv). ‘Ursula was powerless to resist. His eyes burned into hers like sapphires. His strong arms enfolded her tender body as she felt herself being swept away in a whirlwind of passion. Then he dropped his trollies and coughed his filthy yoghurt.’ (from ‘The Gentleman and the Lady’, by Catherine Cookson).

2. trousers.

1998		Guardian 23 Oct. 16: As I stepped out of my trollies.
2000		Guardian Sport 19 Feb. 12: Skin-tight trollies.
2019		P. Baker Fabulosa 299/1: trolliestrousers.