drink at Freeman’s Quay
(alsolush at Freeman’s Quay) [SE drink/lush v. (2); the free drinks distributed at this quay near London Bridge to porters and carmen in 1810–80; the RN amplified it to Harry Freemans (and used it for anything, not merely drink, that was free), while the British Army shortened it to Freemans]
[19C] to drink at another’s expense.
drink at St Patrick’s well
[St Patrick, patron saint of Ireland]
[mid-17C] to drink (Irish) whisky.
drink at the fuzzy cup
[1970s+] (US black) to engage in cunnilingus.
drink by word of mouth
[late 18C–early 19C] to drink straight from the bottle .
drink from both taps
[1990s+] to be bisexual.
drink like a fish
(also...like a goldfish, …a sieve, ...a well) [SE in 20C+]
[mid-17C–19C] to drink heavily.
drink of sauce’s cup
(alsoeat sauce) [SE saucy, insolent]
[late 15C–16C] to be abusive or insolent.
drink on the whip
(alsodrink of the whip, lick on the whip)
[15C–16C] to receive a thrashing.
drink out of the same bottle
[mid-19C; 1930s+] (orig. UK Und., later use US) to be close friends.