鼻はなの下したを伸のばす

expression, godan verb (-su)

ogle; have a lewd look

Idiomatic expression describing a man's slack-jawed, lecherous expression when looking at an attractive woman. Often used humorously or critically.

• 彼かれは美び人じんを見みるとすぐ鼻はなの下したを伸のばす。

  He immediately gets a lewd look on his face when he sees a beautiful woman.

• そんなに鼻はなの下したを伸のばして見みてると、気き持もち悪わるいよ。

  It's creepy when you stare with that lecherous expression.