no dejar títere con cabeza

Etymology
lit. 'to not leave a puppet with a head'. The term alludes to a scene in (Volume 2 Chapter 26) in which in one of Don Quixote's daydreams he mistakes dolls for a maiden's real captors and thus cuts off all their heads.

Verb

 * 1)  to smash up everything in sight
 * 2)  to do away with everything