adverb taking the 'to' particle, noun or participle which takes 'suru'
smooch; light kissing sound
Onomatopoeic word for a light kiss or smacking sound, often used in casual or affectionate contexts.
See also: ちゅう
彼女は彼の頬にチュッとキスをした。
She gave him a light kiss on the cheek.
The baby drank milk with a light smacking sound.