- mid 16th century (in the sense 'part (one's lips) noisily'): from Middle Dutch smacken, of imitative origin
: a sharp slap or blow, typically one given with the palm of the hand
<she gave Mark a smack across the face>
: she closed the ledger with a smack a loud kiss
<I was saluted with two hearty smacks on my cheeks>
smack. (2013). In Oxford Online Dictionary.
Retrieved March 14, 2013, from http://oxforddictionaries.com/definition/english/smack?q=smack