Definition of happy slap in English:

happy slap

noun

British
informal
  • An instance of slapping, punching, or otherwise assaulting a person while being filmed, typically on a mobile phone, the resulting video then being sent or shown to others, or posted on the Internet; an instance of happy slapping.

verb

British
informal
  • with object To slap, punch, or otherwise assault (a person) while being filmed, typically on a mobile phone, the resulting video then being sent or shown to others, or posted on the Internet.

Origin

Early 21st century; earliest use found in The Times Educational Supplement. From happy + slap<br>early 21st century; earliest use found in The Times Educational Supplement. From happy slap.

Pronunciation

happy slap

/ˈhapi slap/