swig

Etymology

Unknown, mid 16th c. Perhaps connected with Old English swelgan (“to swallow”).

verb

1. To drink (usually by gulping or in a greedy or unrefined manner); to quaff.
   That sailor can swig whisky with the best of 'em.
2. (obsolete) To suck.
   As sucking Colts leap when they swig the Teat 1684, Thomas Creech, Idylliums of Theocritus
3. (nautical) To take up the last bit of slack in rigging by taking a single turn around a cleat, then hauling on the line above and below the cleat while keeping tension on the line.

noun

1. (obsolete) Drink, liquor.
2. (by extension) A long draught from a drink.
   take a swig of whisky
   he would have an opportunity of taking a few more swigs before he went down 1830, Frederick Marryat, The King's Own
   Next, he opens up the cupboard over the sink and slams that shut too, only to open another cabinet door that houses what he's looking for, a glass. He pours it full of OJ and takes a huge swig, swallows, and repeats. 2014, Michael Griffo, Starfall (The Darkborn Legacy), New York, NY: Kensington Publishing Corporation, page 26
3. (obsolete) A person who drinks deeply.
4. (nautical) A tackle with ropes which are not parallel.
5. Warm beer flavoured with spices, lemon, etc.