Naut. Also swigg. [Cf. SWIG v.3]
1. A tackle the falls of which are not parallel.
1807. T. Young, Lect. Nat. Philos., II. 197/2. A pulley with ropes not parallel is called by seamen a swigg.
1852. Burn, Naval & Milit. Dict. (1863), Swig. palan.
2. The act of swigging at a rope: see SWIG v.3 3.
1904. Westm. Gaz., 9 July, 12/2. Take a swig on those halliards.