Fun with Adjectives & Idioms

I love learning Japanese idioms.  And I am good at remembering the words for various adjectives.  So when they are combined it makes for a fun class.

To indicate that someone can't keep a secret you say they have a "light mouth". 

To indicate that someone can keep a secret or doesn't talk much, you say they have a "heavy mouth".

To indicate that someone is lazy you say they have "heavy hips".

And to indicate that a woman is, <ahem> ...."easy", you say she has "light hips".