whet someone's appetite
US /wɛt ˈsʌm.wʌnz ˈæp.ə.taɪt/
UK /wɛt ˈsʌm.wʌnz ˈæp.ə.taɪt/

1.
吊足胃口, 引起兴趣
to make someone want more of something or to make someone interested in something
:
•
The preview of the movie really whetted my appetite for the full film.
电影预告片真的吊足了我的胃口,想看完整部电影。
•
The small sample of cheese only whetted her appetite for more.
那小块奶酪只是吊足了她的胃口,让她想吃更多。