Matress-Back, meaning a girl is a "slag" and always has a back to matress doing "the business". Also means that a girl is a prostitute.
1) Bro, that gyals a matback, been with bare mans
2) Oi, did you know Sophie is a matback these days?
To miss something. Came about after Jimmy Floyd Hasselbaink missed an easy goal against Jens Lehmann.
Ah bruv, I've Jimmy'd the bus!
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