hiku-hiku
Small, repeated involuntary movements — a nose twitching, lips quivering, muscles spasming. Subtle but visible to others.
💡Trying not to laugh — 'Her lips were hiku-hiku as she tried to hold back laughter.'
笑いをこらえて口がひくひくしている。
Her mouth is hiku-hiku quivering as she tries not to laugh.
His nose was ___ like a rabbit sniffing the air.
鼻が○○とうさぎのように動いている。