rope-a-dope

Short definition from Wiktionary

Noun

1. 1
   A technique in which the boxer assumes a defensive stance against the ropes and absorbs an opponent's blows, hoping to exploit eventual tiredness or a mistake.
2. 2
   Any strategy where an apparently losing position is assumed in the hope of eventual victory.

Verb

1. 1
   To exhaust someone by stringing them along.