tubby

Etymology

From tub + -y. False cognate with chubby, even though they are often interchangeable.

adj

1. stout, rotund
   Grace bent to her oars with a springing verve and force which made the tubby little boat draw towards the shore, the whispering lapse of water gliding under its sides all the while. 1895, S. R. Crockett, A Cry Across the Black Water
   The clerk vanished, to be replaced a minute later by a tubby Indian with exhausted, visionary eyes. 1986, John le Carré, A Perfect Spy
2. Resembling a tub; sounding dull and without resonance or freedom of sound.
   a tubby violin

noun

1. (derogatory, slang, often used teasingly) An overweight person.