adjective, greas·i·er, greas·i·est.
Origin of greasy
First recorded in 1505–15
greasy is almost always pronounced as [gree-zee] /ˈgri zi/, with a medial [z] /z/, in the South Midland and Southern U.S. and as [gree-see] /ˈgri si/, with a medial [s] /s/, in New England, New York State, and the Great Lakes Basin. Speakers of New Jersey and eastern Pennsylvania are divided, with some using [s] /s/ and some using [z] /z/. Standard British English reflects both [z] /z/ and [s] /s/ pronunciations and British folk speech is also divided regionally, with [z] /z/ heard in the eastern counties and [s] /s/ in the central and western ones. Both pronunciations were brought to the colonies, where the present U.S. pattern emerged.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
adjective greasier or greasiest
coated or soiled with or as if with grease
composed of or full of grease
unctuous or oily in manner
noun plural greasies Australian slang
an outback cook, esp cooking for a number of men
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper