Smirk in Japanese 2024.2.18 Last updated : 2024.2.18 weknow by Interstate How do you say 'Smirk' in Japanese? Native Japanese people often say にやつく(niyatsuku)、ニヤリとわらう(niyarito-warau). 彼はにやついている。 (Karewa niyatsuiteiru.) Talk to us in Japan on Skype! Book now 日本語>> FacebookXHatenaPocketCopy