1
general::
Phrase(s): full of beans
Go to full of hot air.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
1. Lively, energetic, in high spirits, as in The children were full of beans today, looking forward to their field trip. This expression has no valid explanation. [c. 1840] 2. Also, full of prunes. Acting foolish, talking nonsense, as in One cup of coffee won't hurt you? you're full of prunes. [c. 1930] Also see FULL OF CRAP.
American Heritage Idioms