Yes, toping is a Scrabble word!

Verb

1. Drink excessive amounts of alcohol; be an alcoholic

2. Be superior or better than some standard

3. Pass by, over, or under without making contact

4. Be at the top of or constitute the top or highest point

5. Be ahead of others; be the first

6. Provide with a top or finish the top (of a structure)

7. Reach or ascend the top of

8. Strike (the top part of a ball in golf, baseball, or pool) giving it a forward spin

9. Cut the top off

10. Be the culminating event

11. Finish up or conclude