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Rhyming slang for 'poof' (as in homosexual)
"Psst! I hear Jason the rugby captain has a boyfriend. I'd never have guessed he was a slate off the roof!"

"Am I heck as like wearing that flowery- concoction- thinly disguised- as -aftershave on my night out with the boys. Do you want them to think I'm a slate off the roof??"
by Gunglebuns May 29, 2009
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