ほっぺたがおちる

Japanese

edit
For pronunciation and definitions of ほっぺたがおちる – see the following entry.
頬っ辺が落ちる
[verb] (idiomatic) find something so tasty that one's cheeks fall
(This term, ほっぺたがおちる (hoppetagaochiru), is the hiragana spelling of the above term.)