あいた口も塞がらぬ、開いた口も塞がらぬ
あいたくちもふさがらぬ
aitakuchimofusagaranu
JMdict entry #2038950
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expressions (phrases, clauses, etc.)noun or verb acting prenominally
surprising; shocking; jaw-dropping
see: あいた口が塞がらぬ