noun
lout
LOUT/laʊt/
A rude, badly behaved person.
The careless lout puts muddy shoes on a chair and spills a drink toward another diner.

Etymology
The noun’s origin is uncertain, though it may be connected with a verb meaning “bow down.” Its recorded meaning “awkward fellow” or “boor” already combines clumsiness with a lack of refinement.
In context
saying, Sit down, you stupid lout, for wherever I sit will be the head to you;
More examples
- Don't be a lout; wait your turn.
- A couple of louts shove past us in line.
- She refuses to serve the lout who insults her staff.
Forms
lout · louts
loutish adjective — Rude and badly behaved toward other people.