We found 3 dictionaries that define the word the thing to do:

General (2 matching dictionaries)

1. the thing to do: Cambridge Advanced Learner's Dictionary
2. The Thing to Do (album): Wikipedia, the Free Encyclopedia

Miscellaneous (1 matching dictionary)

3. the thing to do: Idioms

Phrases: the right thing to do, the thing in to do a thing, what the right thing to do is, more... ▸ Words similar to the thing to do ▸ Usage examples for the thing to do ▸ Idioms related to the thing to do ▸ Wikipedia articles (New!) ▸ Words that often appear near the thing to do ▸ Rhymes of the thing to do ▸ Invented words related to the thing to do