A way to describe ones flabby body or more specifically the arms after they have not worked out. Also refers to storing flab for the winter for hibernation.
You shouldn't wear that tank-top, not with your arms all flabbernated like that!
Girl, not only is your ass fat, but your arms are flabbernated!
Does this outfit make me look fat? No, but your flabbernated body does!
After giving up her exercise regimen, her body quickly became flabbernated.