adj. & n.
--adj. (fattier, fattiest)
1. like fat; oily, greasy.
2 consisting of or containing fat; adipose.
3 marked by abnormal deposition of fat, esp. in fatty degeneration.
--n. (pl. -ies) colloq. a fat person (esp. as a nickname).
Phrases and idioms:
fatty acid Chem. any of a class of organic compounds consisting of a hydrocarbon chain and a terminal carboxyl group, esp. those occurring as constituents of lipids. fatty oil fixed oil.
Derivatives:
fattily adv. fattiness n.