To act irreverently (disrespectfully) and (disrespect/ lack of consideration)
We drive lightly. We tremble. We drive with a lack of composure.
("Nadav and Abiah, who even they themselves had lightened their heads in their ascent to Mount Sinai when they saw the Shechinah, as it is said (Exodus 24), and they saw God and ate and drank" - Midrash Tanchuma (Warsha) Parashat Be'aloth Simaan 16, and so: "There is no Mendel's staff that lightens the head, even in a small detail, the spirit of the people clings to it" - Bialik/ Mendel's and Shleshet The Krachim, and that: "The bad practice that is followed in some places is to dip one's head in open water and they are not aware of what the water is and how it comes out of the dusty reptiles that drink from it" - Life in the Well/ Feathers, 28)
Translation
Expression (Hebrew)
הֵקֵל רֹאשׁ (הֵקַלְתְּ רֹאשׁ)
Definition (Hebrew)
נָהַג בְּקַלּוּת רֹאשׁ. זִלְזֵל. נָהַג בְּחֹסֶר רְצִינוּת.
("נָדָב וְאָבִיהוּ שֶׁאַף הֵם הֵקֵלּוּ רֹאשָׁם בַּעֲלוֹתָם לְהַר סִינַי כְּשֶׁרָאוּ אֶת הַשְּׁכִינָה שֶׁנֶּאֱמַר (שְׁמוֹת כ"ד) וַיֶּחֱזוּ אֶת הָאֱלֹהִים וַיֹּאכְלוּ וַיִּשְׁתּוּ"-מִדְרַשׁ תַּנְחוּמָא (וַרְשָׁא) פָּרָשַׁת בְּהַעֲלֹתְךָ סִימָן טז, וְכֵן:"אֵין מֶנְדֵּלֵי מֵקֵל רֹאשׁ אֲפִלּוּ בִּפְרָט קָטָן, שֶׁרוּחַ הָעָם נֶאֱחַז בּוֹ"- בְּיָאלִיק/ מֶנְדֵּלֵי וּשְׁלֹשֶׁת הַכְּרָכִים, וְכֵן:"הַמִּנְהָג הָרַע שֶׁנּוֹהֲגִים בְּאֵיזֶה מְקוֹמוֹת לְהָקֵל רֹאשׁ בְּמַיִם מְגֻלִּים וְאֵינָם חוֹשְׁשִׁים שֶׁמָּא הַנָּחָשׁ וְכַיּוֹצֵא בּוֹ מִזּוֹחֲלֵי עָפָר שָׁתוּ מֵהֶם"- חַיִּים בְּאֵר/ נוֹצוֹת, 28)