1 general:: Disposed or inclined toward something, as in I'm in the mood for a good long walk. This phrase is Also put in the negative, I'm not in the mood to argue. [Late 1500s]
American Heritage Idioms
2 general:: Phrase(s): in the mood (for something) [and] in the mood (to do something) having the proper state of mind for a particular situation or for doing something. • I’m not in the mood to see a movie tonight. • Are you in the mood for pizza?
McGrawhill's American Idioms And Phrasal Verbs