Bible Dictionary
GREASE
Grease is a biblical image for excessive prosperity that makes a person spiritually dull, insensitive, or hardened. It describes hearts that have become gross and unresponsive to God’s instruction.
Definition
Grease is fat or suet. In figurative use it describes prosperity that has made a person dull, gross, or unresponsive.
Biblical Usage
Psalm 119:70 says that the hearts of the wicked are as fat as grease, expressing spiritual insensibility and hardness.
Historical Bible Dictionaries
International Standard Bible Encyclopedia (ISBE)
<p>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).</p>