noun
drinking oneself into a stupor; extreme binge drinking
Slang term likening heavy, reckless drinking to the behavior of a yakuza thug. Often implies drinking until passing out or becoming belligerent.
See also: やくざ
昨日は酒ヤクザになって、記憶をなくした。
Yesterday I drank like a thug and blacked out.
彼は酒ヤクザだから、一緒に飲むと危ないよ。
He's a binge-drinking thug, so it's dangerous to drink with him.
やけ酒 is drinking to drown one's sorrows, while 酒ヤクザ emphasizes the aggressive, out-of-control manner of drinking.
深酒 simply means drinking too much, without the thuggish or violent connotation of 酒ヤクザ.
Compound of 酒 (sake, alcohol) and ヤクザ (yakuza, gangster). The term likens extreme, reckless drinking to the stereotypical behavior of a yakuza member.