拖刀背砍計 [－－－－计]

Jyutping to1 dou1 bui3 ham2 gai3
Pinyin tuō dāo bèi kǎn jì

Definitions (Wiktionary)
  1. noun, archaic
    a ploy whereby one feigns defeat in order to entice the enemy to give chase, then suddenly turning to attack, while the enemy is still off-guard
    (syn.) 拖刀計, 拖刀计