Green’s Dictionary of Slang

a fool, a socially unacceptable individual.

1993–2003		Urban Dict. 🌐 womble n. 1. A fictional, long-nosed, litter collecting inhabitant of Wimbledon Common. 2. A spastic on a bicycle. 1. Remember you’re a womble Uncle Bulgaria. 2. Hahaha! Womble!!!
2012		J. Fagan Panopticon (2013) 17: What a fucking womble!