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1) General subject: be on the booze, be on the drink, boose, bowse, carouse, drink, fuddle, guzzle, have a binge, hit the sauce, sling a pot, soak, tipple, to be on the booze, to be on the drink, tope, look on the wine when it is red, guzzle down

2) Colloquial: bib, booze, paint

3) Slang: put it down neck, was neck

4) Rare: bouse

5) Australian slang: bash the turps, raise (one's) elbow

6) Jargon: bend elbow, bum, hit the bottle, lift the elbow, put it down neck, wash neck, be on the bash

7) Makarov: belt the grape, drink deep, drink hard, drink heavily, drink to excess, fuddle oneself