- a rubber, metal, or rope ring, for packing a piston or placing around a joint to make it watertight.
- any of a number of light lines for securing a furled sail to a boom, gaff, or yard.
- a compressible packing piece of paper, rubber, asbestos, etc, sandwiched between the faces or flanges of a joint to provide a seal
- a piece of line used as a sail stop
- to burst out in anger