Green’s Dictionary of Slang

the female breasts.

1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: chebs n. Tits; breasts.
2000		Gav CX Mag. Jun. 🌐 We spend the next half hour playing a game I invented called, ‘What’s bigger than her tits?’ When we finally find something in the pub bigger than her chebs, the next time we clock her is as she’s leaving.