a term used to describe a girl who isn't usually chubby or overweight, but is looking or feeling especially fat or chubby at that certain time. chubetteness can come from eating a large meal and feeling full.
**note that this phrase is only used by girls who are actually NOT fat, but think they're fat.
"uggh! i'm getting to be a real chubette."
"someone's become quite the chubette"