Gwan is a Pattwa' word, It is mainly a Jamaican term. It can mean two things to *go away or *what is going on
Go away - "Tell da boys dem fi gwan."
what is going on? - "Whatta gwan?"
by sacha May 11, 2004
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British term used as slang for cannabis.
'Easy man, fancy smokin' some gwan?'
by Lee Kempin February 1, 2006
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A term used to describe the feeling you get after smoking marijuana and can also be used to refer to the ganja itself.
"My friends and i just smoked a fat blunt and we're pretty Gwan."

"Hey man you got any Gwan?"

by SmellyFishMan July 5, 2009
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slang from Cork city in Ireland - short for "go on". The term made it's made to the Carribean while Irish slaves were shipped there in the 16th and 17th centuries. Slang Irish terms like this then made their way into the Carribean "patois", particularly Jamaica, where "gwan" is pronounced and used in exactly the same way as in Cork city in Ireland.
"Ah gwan ya langball ya"

"Please do go on about that wonderful event that you are informing me about."
by starchaser February 6, 2004
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