Strong's Concordance

Original word: טָפַשׁ
Transliteration: taphash
Definition (short): covered
Definition (full): to be thick, to be stupid

NAS Exhaustive Concordance

Word Origin: a prim. root
Definition: to be gross
NASB Translation: covered (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

A primitive root; properly, apparently to be thick; figuratively, to be stupid -- be fat.
KJV: Their heart is as fat as grease; but I delight in thy law.
NASB: Their heart is covered with fat, But I delight in Your law.