Sense: 1-2, 4
|Origin:||Perhaps from Yiddish shmek 'sniff, slight smell, small mount of snuff'|
a hit with your open hand, especially to punish a child [↪ slap]:
You're going to get a smack in a minute!
b) British English informal
a hard hit with your closed hand [= punch]
smack in the mouth/face/gob
Talk like that and I'll give you a smack in the mouth.
2 [countable usually singular]
a short loud noise caused when something hits something else:
The book landed with a smack.
3 [uncountable] informalMDD
to kiss someone loudly
a small fishing boat