Definition of smashing:
(adj) :
serving to
smash (something); (British informal)
Wonderful, very
good or
impressive. Thought to be corruption of Irish is maith ? sin (meaning "that's good")
"the boxer delivered a smashing blow to his opponent's head."
(n) :
gerund: The action of the verb to
smash
"some Greek dance is traditionally accompanied by the smashing of crockery."