trad: 他們正在互相諷刺。 simpl. 他们正在互相讽刺。
Tāmen zhèng zài hùxiāng fěngcì.
They are mocking each other.
( Google and Bing Machine Translations: )Họ trêu nhau. ?
Họ đang mocking lẫn nhau. ?
( Human Translation: )
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like: Mocking ? ?
to stick one’s fingers down one’s throat; mocking, scoffing ? 
móc họng ?