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Slang version of the saying "That's the main thing".
Originating in the South Wales valleys and mainly associated with 'Chavs', it often has no real meaning or connection to its predecessor when used in conversation.
Girl: "Oh my God, I totally nearly just died"
Boy: "Issit? Thasa main innit"

Boy 1: "We're going out tonight!"
Boy 2: "Issit? It is issit? Thasa main innit!
by hamm1911 August 07, 2010
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
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by ecogoth December 30, 2020
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