1. [early 18C–19C] (US Und.) to embezzle the takings of an illegal card-game, confidence trick etc; thus sink someone on/of v., to cheat a partner of such takings.
2. [late 18C+] (also sink back) to drink alcohol, e.g. sink the amber, to drink beer [note Antidote against Melancholy (1661) ‘In a pint there’s small heart, Sirah, bring a quart / [...] / Wee’l sink him before sunset’].
3. [late 19C–1900s] (US) to bury; also in fig. use.
4. [1900s] to betray, to inform on.
5. [1960s] (US) to hit.
6. [2010s] (UK black) to eat, to consume.
[mid-17C–1940s] a general oath.
SE in slang uses
[mid–late 19C] the throat.
[1910s] (Aus.) a winner at cards who leaves the game without offering a chance for his opponents to redeem their losses.
[1990s+] to drink stout.
[20C+] (Aus./N.Z.) to give a kicking.
see under little man (in the boat) n.
[1960s] of a man, to have sexual intercourse.
[1960s+] to have sexual intercourse; to have anal intercourse.