Then God said, "Behold, I am going to make a covenant. Before all your people I will perform miracles which have not been produced in all the earth nor among any of the nations; and all the people among whom you live will see the working of the LORD, for it is a fearful thing that I am going to perform with you.
Strong's Concordance
Original word: שָׁגַע
Transliteration: shaga
Definition (short): madman
Definition (full): to rave through insanity
NAS Exhaustive Concordance
Word Origin: a prim. root
Definition: to be mad
NASB Translation: act the madman (1), behaving as a madman (1), demented (1), driven mad (1), mad fellow (1), madman (1), madmen (1).