grouser

(engineering) A temporary pile or a heavy, iron-shod pole driven into the bottom of a stream to hold a drilling or dredging boat or other floating object in position. Also known as spud.

noun

A person who habitually complains or grumbles: complainer, crab, faultfinder, grouch, growler, grumbler, grump, murmurer, mutterer, whiner. Informal crank, griper. Slang bellyacher, sorehead, sourpuss. See happy/unhappy.