What is the meaning of Swig?

To drink ; to quaff.

To suck.

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.

Drink, liquor.

A long draught from a drink.

A person who drinks deeply.

A tackle with ropes which are not parallel.

Warm beer flavoured with spices, lemon, etc.

Source: wiktionary.org