Meaning

noun a large bottle with a narrow mouth

noun the quantity contained in a jug

verb lock up or confine, in or as in a jail

originFrom Middle English jugge, of uncertain origin. Possibly a variant of Middle English jubbe, jobbe, iubbe, geobbe, itself of unknown origin; or perhaps continuing (in altered form) Old English ċēac (“pitcher; jug”). Compare also jug (“a low woman, maidservant”), from Jug, familiar form of Joanna. Prison sense attested from at least 1825 in Britain.

Etymology from Wiktionary, CC BY-SA 3.0