have someone's head

/HH AE1 V S AH0 M W AH0 N EH0 S EH0 D/
verb
  1. 1

    (idiomatic, figurative) To punish someone severely, as by sacking (firing), imprisonment, or similarly harsh penalties.

  2. 2

    (literal) To kill somebody, especially with violence and especially by decapitation.