A teasing expression or manner shows that the person is not completely serious about what they are saying or doing.
⇒ 'But we're having such fun, aren't we?' he protested with a teasing smile.
⇒ Smith was at his most teasing.
graded adverb [usually ADVERB with verb]
⇒ 'My, what a lot of things you want to know, Sergeant', she said teasingly.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers