This is no joke
Question: This matter is very serious and even risky.
(Modern Hebrew)
Translation
Expression (Hebrew)
זֶה לֹא צְחוֹק
Definition (Hebrew)
בְּהַשְׁאָלָה: הַדָּבָר הַזֶּה מְאוֹד רְצִינִי וְאַף כְּרוֹף הַסִּכּוּנִים.
(הָעִבְרִית הַחֲדָשָׁה)