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Pronounced (Mass-eye)

Basically means massive. Origins not exactly known, but probably from North-East England
"Aaaah mate, that girl has massi tits"
by Yebsthescally April 06, 2009
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2
a vulgar ginger that has a tiny dick.
β€œlook at that redhead rapist over there!”
β€œmust be a massi”
by pewpewnibba September 25, 2017
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