寝ね業わざ師し

noun

underhanded person; Machiavellian schemer

Refers to someone who uses cunning, behind-the-scenes tactics, often in politics or business. The term originally comes from judo, where 寝技 (newaza) are ground techniques, implying a person who works from a hidden or disadvantaged position.

• 彼かれは政せい界かいの寝ね業わざ師しとして知しられている。

  He is known as a behind-the-scenes operator in the political world.

• あの寝ね業わざ師しに騙だまされないように気きをつけろ。

  Be careful not to be deceived by that schemer.