bitch slap

Short definition from Wiktionary

Noun

1. 1
   An open-handed slap to the face.
2. 2
   Alternative spelling of bitch slap.

Verb

1. 1
   Alternative spelling of bitch-slap.
2. 2
   To slap someone powerfully in the face, meant to assert dominance or control over the receiver; to deliver a bitch slap to.