Tubby is a related term of bulky.
As adjectives the difference between tubby and bulky
is that tubby
is stout, rotund while bulky
is being large in size, mass, or volume.
As a noun tubby
is (pejorative|slang|often used teasingly) an overweight person.
Resembling a tub; sounding dull and without resonance or freedom of sound.
- a tubby violin
(pejorative, slang, often used teasingly) An overweight person.
Being large in size, mass, or volume.
(bodybuilding) Having excess body mass, especially muscle.