From shuwb; apostate, i.e. Heathenish or (actually) heathen -- backsliding.
see HEBREW shuwb
H7728. shobeb
שׁוֺבֵב adjective backturning, apostate (perhaps for ׳מְשׁוֺ, see I. שׁוֺבָב); — as substantive, ׳לְשׁו Micah 2:4 (but read probably שׁוֺבֵינוּ our captors); feminine הַשּׁוֺבֵבָה הַבַּת Jeremiah 31:22 (of Israel), 49:4 (of Ammon).