(geology) A soil containing clay minerals that absorb water and swell, causing bumps across terrain.

Overly proud; egotistical.

(idiomatic) To become swollen

(archaic, slang) Well-dressed thieves and swindlers, regarded collectively.

plural of swell mob

The capacity of certain clay minerals to expand when wet and retract when dry.

plural of swelling soil

plural of swell box

plural of swell-mobsman

(archaic, slang) A thief who dresses well and tries to appear respectable.