Sleynn is New Zealand slang for a certain strain of marijuana (also known as Boléia), usually highly potent and harder to get than the typical marijuana. This specific strain of marijuana grows commonly in New Zealand, but could possibly be grown elsewhere.
"Hey bro, I know where we can score some Sleynn for tonight, its good shit!"
by Nick Brownns August 03, 2006
A new zealand word commonly used as slang for the word nigger
fuck you sleynn
what are you doing sleynn
of me you sleynn
by draid006 August 03, 2006

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