you knows it

This phrase was popularised by The GLC from Newport, Wales, but has had currency in US Afro-American vernacular English and possibly elsewhere since no later than the 1960s.

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you knows it

1. (idiomatic, dialectal, slang) Indicates agreement, approval, encouragement.

   "What he did to her was wrong." "You knows it, sister!"

   • 1861, Frederick Law Olmsted, The Cotton Kingdom: A Traveller's Observations on Cotton and Slavery, page 187

     Mose would ha rallied, ef eed a been in our ward — ha ! ha ! ha ! — you knows it, Mass Richard !

   • 1984, Brian Richard Mori, Dreams of Flight, page 20

     Buster: (impressed) You'se a cool dude, Butch. / Butch: Hey, you knows it, baby.

   • 2002, Lorian Hemingway, A World Turned Over: A Killer Tornado and the Lives It Changed Forever, page 112

     We welcome you, you knows it. Didn't even need to ask, but it fine all right you did.

• you know it