The Bedside Dream Dictionary

by Silvana Amar
As usual, the interpretation of this dream depends on you. You may be concerned about your looks and fear that you are becoming fat. Be realistic in regard to this area of your life.

If you are very thin and can not stop worrying about your weight, you should see a doctor. Psychologically speaking, obesity usually is a sign that the individual has issues with self-esteem and personal power. In dreams about obesity fat emotionally insulates us from others and isolates us physically.

Dream Symbols in The Dream Encyclopedia

by James R. Lewis and Evelyn Dorothy Oliver
The popular psychological interpretation of obesity is lack of self-esteem and overindulgence in fear and denial; layers of protection to insulate the dreamer from involvement or action; hopelessness and helplessness to express power and authority; fear that rejection will be the only reward for effort. Other possible meanings are the “fat cat” who ate the mouse, being “full of oneself,” or fattening up the livestock (for slaughter). (See also Fat).

Complete Dictionary of Dreams

by Dr. Mıchael Lennox
If you dream of being obese, you are connecting with the consequences of overindulgence in some area of your life.

If you have issues of weight in your waking life, such a dream may be more literal. Extra body fat can also be a symbolic expression of protection and avoidance of deeper issues.