1
general::
Phrase(s): whet someone’s appetite
Fig. to cause someone to be interested in something and to be eager to have, know, learn, etc., more about it. • Seeing that film really whetted my sister’s appetite for horror films. She now sees as many as possible. • My appetite for theater was whetted when I was very young.
McGrawhill's American Idioms And Phrasal Verbs