To go astray/ fall into evil way/ to deviate from the right path/ to be spoiled/ corrupted
To begin behaving badly, fall in with negative company, or corrupt one's ways.
("Menachem went out and Shammai gathered together. To what place did he go out? My father said: He went out to spread evil. Rabbah said: He went out to serve the king" - Haggai 16b, and so on: "A parable to a wise man who opened a store for his son in the market of prostitutes, the merchant did his own and the craftsman did hers and the young man did his own. He went out "To multiply evil" - Shemot Rava (Vilna) Parashah because you will bear a Parashah from Mag, and so on: "...and so the Parshah of the Rambam, do not strengthen yourself, O wicked one, for from within you will come forth to multiply evil" - Rav Obadiah Yosef/ Branch of the Tree of the Forefathers - on the chapters of the Forefathers of Mag Kaneb, and so on: "Rabbi Shlomo shaved his beard and said, "Do one deed that his son may come forth To spread evil. He came before the Be'esh. The Be'esh told him, "Let him double his love for his son" - Agnon/ Orech Natah Lalon, 30, and also: "I have heard that this ornament of yours will spread evil, and certainly it will desecrate the Sabbath as well" - Berkowitz/ Ba'al Shimcha)
Translation
Expression (Hebrew)
יָצָא לְתַרְבּוּת רָעָה
Definition (Hebrew)
הֵחֵל לְהִתְנַהֵג בְּצוּרָה רָעָה. הִתְחַבֵּר לְחֶבְרַת אֲנָשִׁים שְׁלִילִיִּים. קִלְקֵל אֶת דְּרָכָיו.
("יָצָא מְנַחֵם וְנִכְנַס שַׁמַּאי כו'. לְהֵיכָן יָצָא? אַבַּיֵּי אָמַר: יָצָא לְתַרְבּוּת רָעָה. רַבָּא אָמַר: יָצָא לַעֲבוֹדַת הַמֶּלֶךְ"- חֲגִיגָה טז ע"ב, וְכֵן:"מָשָׁל לְחָכָם שֶׁפָּתַח לִבְנוֹ חֲנוּת שֶׁל בְּשָׂמִים בַּשּׁוּק שֶׁל זוֹנוֹת, הַמָּבוֹי עָשָׂה שֶׁלּוֹ וְהָאָמָּנוּת עָשְׂתָה שֶׁלָּהּ וְהַנַּעַר כְּבָחוּר עָשָׂה שֶׁלּוֹ יָצָא לְתַרְבּוּת רָעָה"- שְׁמוֹת רַבָּה (וִילְנָא) פָּרָשַׁת כִּי תִּשָּׂא פָּרָשָׁה מג, וְכֵן:"...וְכֵן פֵּרֵשׁ הָרַמְבָּ"ם, אַל תַּחֲזִיק עַצְמְךָ רָשָׁע,שֶׁמִּתּוֹךְ כָּךְ אַתָּה יוֹצֵא לְתַרְבּוּת רָעָה"- הָרַב עוֹבַדְיָה יוֹסֵף/ עֲנַף עֵץ אָבוֹת- עַל פִּרְקֵי אָבוֹת קמג קנב, וְכֵן:"הֶחֱלִיק רַבִּי שְׁלֹמֹה אֶת זְקָנוֹ וְאָמַר, מַעֲשֶׂה בְּאֶחָד שֶׁיָּצָא בְּנוֹ לְתַרְבּוּת רָעָה. בָּא לִפְנֵי הַבֵּעשְׁ"ט. אָמַר לוֹ הַבֵּעשְׁ"ט, שֶׁיַּכְפִּיל אֶת אַהֲבָתוֹ לִבְנוֹ"- עַגְנוֹן/ אוֹרֵחַ נָטָה לָלוּן, 30, וְכֵן:"שָׁמַעְתִּי כִּי תַּכְשִׁיט זֶה שֶׁלְּךָ יָצָא לְתַרְבּוּת רָעָה ,וּבְוַדַּאי מְחַלֵּל גַּם אֶת הַשַּׁבָּת"- בֶּרְקוֹבִיץ/ בַּעַל שִׂמְחָה)