A person who grouses; a grumbler.
A temporary pile driven into the bottom of a river to hold a boat in position; a spud.
A protrusion on the surface of a wheel or continuous track segment, intended to increase traction in soil, snow, or other loose material.
One who dampens fun; especially, one who declines to participate in or enjoy a party or some other group activity; one who does not agree with the opinions of a group.