Yes, tipped is a Scrabble word!

Adjective

1. Having a tip; or having a tip as specified (used in combination)

2. Departing or being caused to depart from the true vertical or horizontal

Verb

1. Cause to tilt

2. Mark with a tip

3. Give a tip or gratuity to in return for a service, beyond the compensation agreed on

4. Cause to topple or tumble by pushing

5. To incline or bend from a vertical position

6. Walk on one's toes

7. Strike lightly

8. Give insider information or advise to

9. Remove the tip from