Shakespeare has given several allusions to the old customs associated with drinking, which have always varied in different countries. At the present day many of the drinking customs still observed are very curious, especially those kept up at the universities and inns-of-court. Alms-drink was a phrase in use, says Warburton, among good fellows, to signify that liquor of another’s share which his companion drank to ease him. So, in “Antony and Cleopatra” (ii. 7) one of the servants says of Lepidus: “They have made him drink alms-drink.”
By-drinkings.This was a phrase for drinkings between meals, and is used by the Hostess in “1 Henry IV.” (iii. 3), who says to Falstaff: “You owe money here besides, Sir John, for your diet, and by-drinkings.”
Hooped Pots.In olden times drinking-pots were made with hoops, so that, when two or more drank from the same tankard, no one should drink more than his share. There were generally three hoops to the pots: hence, in “2 Henry VI.” (iv. 2), Cade says: “The three-hooped pot shall have ten hoops.” In Nash’s “Pierce Pennilesse” we read: “I believe hoopes on quart pots were invented that every man should take his hoope, and no more.” The phrases “to do a man right” and “to do him reason” were, in years gone by, the common expressions in pledging healths; he who drank a bumper expected that a bumper should be drunk to his toast. To this practice alludes the scrap of a song which Silence sings in “2 Henry IV.” (v. 3): “Do me right, And dub me knight: Samingo.” He who drank, too, a bumper on his knee to the health of his mistress was dubbed a knight for the evening. The word Samingo is either a corruption of, or an intended blunder for, San Domingo, but why this saint should be the patron of topers is uncertain.
Rouse.According to Gifford,  a rouse was a large glass in which a health was given, the drinking of which, by the rest of the company, formed a carouse. Hamlet (i. 4) says: “The king doth wake to-night, and takes his rouse.” The word occurs again in the following act (1), where Polonius uses the phrase “o’ertook in’s rouse;” and in the sense of a bumper, or glass of liquor, in “Othello” (ii. 3), “they have given me a rouse already.”
Sheer Ale. This term, which is used in the “Taming of the Shrew” (Induction, sc. 2), by Sly—“Ask Marian Hacket, the fat ale-wife of Wincot, if she know me not: if she say I am not fourteen pence on the score for sheer ale”—according to some expositors, means “ale alone, nothing but ale,” rather than “unmixed ale.”
Sneak-cup. This phrase, which is used by Falstaff in “1 Henry IV.” (iii. 3)—“the prince is a Jack, a sneak-cup”—was used to denote one who balked his glass.
From Thomas Firminger Thiselton-Dyer’s indispensable volume Folk-lore of Shakespeare.