What is the meaning of Chubby?

Of a person: slightly overweight, somewhat fat, and hence plump, rounded, and soft.

Of a body part: containing a moderate amount of fat.

A chubby, plump person

An overweight or obese gay man.

A penile erection, especially when short and with a large circumference; a boner.

A type of thickly-padded fur jacket.

Source: wiktionary.org