jorum
The contents, or quantity of the contents, of such a vessel.
To cure you at once of sciatical pains, / That hamper your body in dolorous pains, / And keep you confin'd in your sheets without motion, / Take me two jorams of wine for a potion, / Reserving two glasses by way of a lotion, / Which warm you'll apply to the part that's affected, / Then tip the remainder, as I have directed, / To cure you.
A large quantity.
figuratively
[…] while Miss Skiffins brewed such a jorum of tea, that the pig in the back premises became strongly excited, and repeatedly expressed his desire to participate in the entertainment.
Where it comes from
Uncertain; perhaps from the Hebrew name of Joram, who “brought with him [to King David] vessels of silver, and vessels of gold, and vessels of brass” (Bible (King James Version), 2 Samuel 8:10; compare Jeroboam); or from Arabic جَرَّة (jarra, “earthen receptacle”).
Adapted from the Wiktionary entry jorum (CC BY-SA 4.0).