smack1
  
  n.
  - a sharp blow or slap, typically one given with the palm of the hand. 
▸a loud, sharp sound made by or as by such a blow.
 - a loud kiss.
 
v.
    - hit with a smack.
 - smash, drive, or put forcefully into or on to something.
 - part (one's lips) noisily.
 - archaic crack (a whip).
 
adv.
 
(
Brit. also 
smack bang)
 
informal  - in a sudden and violent way.
 - 
(N. Amer. also smack dab)
 exactly; precisely.
 
 
  Phrase
  
    
      - a smack in the face 
(or eye)
 informal a strong rebuff. 
    
   
  Etymology
  C16: from MDu. smacken, of imitative origin.
 
  
    
smack2
  
  v.
 
(
smack of)
  
- have a flavour or smell of.
 - suggest the presence or effects of.
 
n.
 
(
a smack of)
 a flavour, smell, or suggestion of.
 
  Etymology
  OE smæc ‘flavour, smell’, of Gmc origin.
 
  
    
smack3
  
  n.
 Brit. a single-masted sailing boat used for coasting or fishing.
 
  Etymology
  C17: from Du. smak, of unknown origin.
 
  
    
smack4
  
  
  Etymology
  1940s: prob. an alt. of Yiddish shmek ‘a sniff’.