Like a pig or behaving in a way that is not polite or kind.
The word 'swinish' makes people think of dirt, bad smells, and rude behavior.
Examples:
The swinish man ate with his hands.
She made a swinish noise when she ate.
The swinish smell filled the room.
The swinish boy wouldn't share his toys.
The swinish behavior was very bad.
The swinish pig rolled in the mud.