嘘 (w)

(xū) exhale; hiss

嘘嘘 (w)

(xūxū) to pee pee (kiddie or feminine slang)

嘘寒问暖 (w)

(xūhánwènnuǎn) to ask about sb's health

嘘声 (w)

(xūshēng) hissing sound; to hiss (as a sign of displeasure)