Verb

1. engage in an activity as if it were a game rather than take it seriously
2. manipulate manually or in one's mind or imagination
3. behave carelessly or indifferently

Noun

1. any of several breeds of very small dogs kept purely as pets
2. copy that reproduces something in greatly reduced size
3. an artifact designed to be played with
4. a nonfunctional replica of something else (frequently used as a modifier)