Thesaurus:obese

• big-boned (euphemistic)
• bulbous
• corpulent
• curvy (of women, sometimes euphemistic)
• Daniel Lambertish
• eurysome
• famine resistant (euphemistically humorous)
• gravitationally challenged (euphemistically humorous)
• horizontally challenged (euphemistically humorous)
• obese
• rotund
• round
• spherical

Derogatory:

• big as a house
• bloated
• blubbery (US)
• fat as a cow
• fat as a pig
• gross (US)
• lardy (slang)
• poddy
• porcine
• porky (slang)
• tubby (slang)

• scrawny    [⇒ thesaurus]
• thin
• emaciated
• anorexic
• starved
• willowy

• morbidly obese
• superobese

• fat    [⇒ thesaurus]
• heavyset
• overweight    [⇒ thesaurus] (often used coordinately rather than hypernymically)

• overweight    [⇒ thesaurus] (often used coordinately rather than hypernymically)

• physique    [⇒ thesaurus]