An example of back slang that should appeal to Mudcatters is "Banjo" or "Whistle" for suit - from "Banjo and Flute", or "Whistle and Flute".

And if properly dressed up you'd have a "titfer" as well. ("Tit for Tat" - but God knows where that comes from. God and someone on the Mudcat who will probably tell us.) That's just one of the words people use all their liofe, and never realise that any rhyming slang is involved.

I'm not too sure Brit itself isn't rhyming slang as well...