Also see definition of "Grease" in Word Study
Grease
GREASE [isbe]
GREASE - gres (chelebh, "fat," "suet"): The word occurs once in the metaphorical sense "prosperous," then dull, gross, brutal: "Their heart is as fat as grease" (Ps 119:70; compare Isa 6:10, and see FAT).
Also see definition of "Grease" in Word Study