Webster's Revised Unabridged Dictionary · 1913

Jug

Jug (jug) , noun

[Probably from Jug, a corruption of, or nickname for, Joanna; compare 2d Jack, and Jill. See Johannes.]

1.
A vessel, usually of coarse earthenware, with a swelling belly and narrow mouth, and having a handle on one side.
2.
A pitcher; a ewer. [English]
3.
A prison; a jail; a lockup. [Slang] — Gay
4.
A woman's breasts; as, nice jugs. [vulgar slang]

Jug (jug) , transitive verb

1.
To seethe or stew, as in a jug or jar placed in boiling water; as, to jug a hare.
2.
To commit to jail; to imprison. [Slang]

Jug , intransitive verb

1.
(Zoology) To utter a sound resembling this word, as certain birds do, especially the nightingale.
2.
To nestle or collect together in a covey; -- said of quails and partridges.