scrub

One who labors hard and lives meanly; a mean fellow.

One who is incompetent or unable to complete easy tasks.

A thicket or jungle, often specified by the name of the prevailing plant

(US, stock breeding) One of the common livestock of a region of no particular breed or not of pure breed, especially when inferior in size, etc. Often used to refer to male animals unsuited for breeding.

Vegetation of inferior quality, though sometimes thick and impenetrable, growing in poor soil or in sand; also, brush.

One not on the first team of players; a substitute.

(obsolete, slang) Informal attire or dress code; morning dress