しらっと

しらっと

〔白けた様子〕 as if the fun had been ruined; 〔平然と〕 in a dispassionate manner; 〔よそよそしく〕 in a distant [chill, standoffish] manner.

●しらっとした顔でどぎつい冗談をいう crack a shocking joke with a straight [poker] face.

●彼は何を言われてもいつもしらっとしている. He remains nonchalant regardless of what people say to him.

・突然彼が怒りだして座がしらっとなった. His sudden outburst of anger threw a wet blanket [damper] on the gathering.