'Fatty' definitions:

Definition of 'fatty'

From: WordNet
adjective
Containing or composed of fat; "fatty food"; "fat tissue" [syn: fatty, fat] [ant: fat-free, fatless, nonfat]
noun
A rotund individual [syn: fatso, fatty, fat person, roly-poly, butterball] [ant: scrag, skin and bones, thin person]

Definition of 'Fatty'

From: GCIDE
  • Fatty \Fat"ty\, a. Containing fat, or having the qualities of fat; greasy; gross; as, a fatty substance. [1913 Webster]
  • Fatty acid (Chem.), any one of the paraffin series of monocarbonic acids, as formic acid, acetic, etc.; -- so called because the higher members, as stearic and palmitic acids, occur in the natural fats, and are themselves fatlike substances.
  • Fatty clays. See under Clay.
  • Fatty degeneration (Med.), a diseased condition, in which the oil globules, naturally present in certain organs, are so multiplied as gradually to destroy and replace the efficient parts of these organs.
  • Fatty heart, Fatty liver, etc. (Med.), a heart, liver, etc., which have been the subjects of fatty degeneration or infiltration.
  • Fatty infiltration (Med.), a condition in which there is an excessive accumulation of fat in an organ, without destruction of any essential parts of the latter.
  • Fatty tumor (Med.), a tumor consisting of fatty or adipose tissue; lipoma. [1913 Webster]