וְגַ֣ם ׀ אֶת־מַעֲכָ֣ה אִמּ֗וֹ וַיְסִרֶ֙הָ֙ מִגְּבִירָ֔ה אֲשֶׁר־עָשְׂתָ֥ה מִפְלֶ֖צֶת לָאֲשֵׁרָ֑ה וַיִּכְרֹ֤ת אָסָא֙ אֶת־מִפְלַצְתָּ֔הּ וַיִּשְׂרֹ֖ף בְּנַ֥חַל קִדְרֽוֹן׃
Sogar seine Mutter Maacha setzte er als Herrscherin ab, weil sie ein Scheusal [Götzenbild] gemacht der Asera. Assa fällte ihr Scheusal und verbrannte es im Thale Kidron.
Rashi
He removed from her position of authority. From being queen.
Rashi
For she had made a fearful image. Our Rabbis stated [that מפלצת is a combination of] מפליא ליצונתא [=extreme lasciviousness]. She made for it a phallic symbol,1Alternatively, an image that casts fear and dread unto its worshipers.—Radak and she would copulate with it every day.2Maseches Avodah Zarah 44a.