1 [jey]
any of several noisy, vivacious birds of the crow family, subfamily Garrulinae, as the crested Garrulus glandarius, of the Old World, having brownish plumage with blue, black, and white barring on the wings. Compare blue jay, gray jay.
Informal. a simpleminded or gullible person.

1275–35; Middle English jai < Middle French < Late Latin gāius, gāia, perhaps after Latin Gāius man's name

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2 [jey]
noun Slang.
a marijuana cigarette.

1970–75; probably spelling of initial consonant of joint, perhaps suggested by Pig Latin version ointjay


John, 1745–1829, U.S. statesman and jurist: first chief justice of the U.S. 1789–95.
a male given name.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
jay (dʒeɪ)
1.  See also blue jay any of various passerine birds of the family Corvidae (crows), esp the Eurasian Garrulus glandarius, with a pinkish-brown body, blue-and-black wings, and a black-and-white crest
2.  a foolish or gullible person
[C13: from Old French jai, from Late Latin gāius, perhaps from proper name Gāius]

Jay (dʒeɪ)
John 1745--1829, American statesman, jurist, and diplomat; first chief justice of the Supreme Court (1789--95). He negotiated the treaty with Great Britain (Jay's treaty, 1794), that settled outstanding disputes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1300, common European bird (Garrulus glandarinus), from O.Fr. gai, from L.L. gaius "a jay," probably echoic and supposedly influenced by L. Gaius, a common proper name. For other bird names from proper names, cf. martin and parrot. Applied to
the N.Amer. blue jay (Cyanocitta cristata) from 1709. Applied to humans in sense of "impertinent chatterer, flashy dresser" from 1620s. Jayhawker is Amer.Eng., 1858, originally "freebooter, guerrilla, Kansas irregular" (esp. one who came from the North). Jay was slang for "fourth-rate, worthless" (1888) cf. a jay town.
Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

J definition

and jay
  1. n.
    a marijuana cigarette; marijuana. (Drugs. From the initial letter of joint.) : A jay will cost you two clams.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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Example sentences for jay
Such familiarity has inspired a long list of colloquial names for the gray jay.
An angry jack slaps her for wasting half a jay of good mooter.
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