This fellow came in to lodge and already plays the judge
A nickname for a new resident or someone new in the area who already involves himself in others' affairs and tries to change the local customs.
("And they said, 'Come down here,' and they said, 'This one came to lodge and judges already; now you have become worse than them'" - Genesis 19:9 (men of Sodom to Lot), and likewise: "There were five chief judges in Sodom; Lot was the chief judge over them all. When he said words that agreed with them, they said, 'Come down here'—go up above; and when he said words that did not agree with them, they said, 'This one came to lodge and already judges.'" - Midrash Bereishit Rabbah 50, and likewise: "The city leader cries out, 'This one came to lodge...' and admonishes him not to insert his head in a place not his own." - Agnon, 'Elu Va'elu, Ma'alot U'moradot', 130)
Translation
Expression (Hebrew)
הָאֶחָד בָּא לָגוּר וַיִּשְׁפּוֹט שָׁפוֹט
Definition (Hebrew)
כִּנּוּי לְתוֹשָׁב חָדָשׁ אוֹ מִישֶׁהוּ חָדָשׁ בַּסְּבִיבָה שֶׁכְּבָר מִתְעָרֵב בְּעִנְיְנֵי הַזּוּלָת וּמְנַסֶּה לְשַׁנּוֹת מִמִּנְהֲגֵי הַמָּקוֹם.
("וַיֹּאמְרוּ גֶּשׁ הָלְאָה, וַיֹּאמְרוּ ,הָאֶחָד בָּא לָגוּר וַיִּשְׁפֹּט שָׁפוֹט עַתָּה נָרַע לְךָ מֵהֶם"- בְּרֵאשִׁית יט ט (אַנְשֵׁי סְדוֹם לְלוּט ), וְכֵן:"חֲמִשָּׁה רָאשֵׁי דַּיָּנִים הָיוּ בִּסְדוֹם, לוֹט הָיָה אַרְכִי דַּיָּנִים שֶׁבְּכֻלָּם. בְּשָׁעָה שֶׁהָיָה אוֹמֵר לָהֶם דְּבָרִים שֶׁהֵם עֲרֵבִים לָהֶם, הֵם אוֹמְרִים:"גַּשׁ הָלְאָה"- עֲלֵה לְמַעְלָה, וּבְשָׁעָה שֶׁהָיָה אוֹמֵר לָהֶם דְּבָרִים שֶׁאֵין עֲרָבִים לָהֶם, הָיוּ אוֹמְרִים:"הָאֶחָד בָּא לָגוּר וַיִּשְׁפֹּט שָׁפוֹט"- מִדְרַשׁ בְּרֵאשִׁית רַבָּה נ , וְכֵן:"רַב הָעִיר צוֹעֵק הָאֶחָד בָּא לָגוּר וְגֵו' וּמַתְרֶה בּוֹ שֶׁלֹּא יַכְנִיס רֹאשׁוֹ בְּמָקוֹם שֶׁאֵינוֹ שֶׁלּוֹ"- עַגְנוֹן/ אֵלּוּ וָאֵלּוּ, מַעֲלוֹת וּמוֹרָדוֹת, 130)