bakers dozen

Noun

baker's dozen (plural baker's dozens or bakers' dozens)

1. (idiomatic) Thirteen; a group of thirteen.
   • [L]et him caſt his Eye upon the laſt Page of that Book, where Mr. Blount has tranſlated a Quotation out of Scaliger de Emend. brought by the Author of the Præadamitæ; now he tranſlates Octingenties octagies, not eight hundred and eighty, but eight hundred and eightſcore; as if the Romans had uſed...1696, William Nicholls, “The Preface to the Reader”, in A Conference with a Theist. Wherein I. Are Shewn the Absurdities in the Pretended Eternity of the World. II. The Difficulties in the Mosaick...

   Synonyms:

   devil's dozen, long dozen

2. (Cockney, slang) A cousin.
   • "Before I agree to help you and your baker's dozen over there …" Rose nodded at Larry. / "It means cousin," Larry said. / "Before I say yes to helping, I would like a low-risk, up-front agreement."2015 February, Kevin Sylvester, Neil Flambé and the Bard’s Banquet (Neil Flambé Capers; 5), 1st paperback edition, New York, N.Y.: Simon & Schuster Books for Young Readers, →ISBN, page 65

See all 3 meanings of baker's dozen