What does "a good time" mean in English for Spanish?

In English for Spanish, "a good time" means:

un buen momento

Listen to "a good time": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

  • English for Spanish 4, Level 3, Scene 3