chub·by \ˈchəbē, -bi\adjective (-er/-est) Etymology:chub + -y : short, thick, and well-rounded : chunky, plump < a chubby cigar > < a chubby boat > especially: marked wholesomely by ample flesh : well-fed and not lean or wiry < of middle height … stocky though not chubby — W.A.White > < a chubby little boy > Synonyms:see fat