海千 うみせん山千 やません
umisen'yamasen

Noun
no-Adjective

1. cunning and experienced in the ways of the world; crafty and worldly-wise; sly old (fox)

Yojijukugo
あいつは海千 うみせん山千 やませんだから、取 相手 あいてとしてはかなり手強 てごわいぞ。
aitsuwa umisen'yamasendakara torihikiaiteto shitewa kanari tegowaizo.
All those tricks he's got up his sleeve make him a formidable client.