From smash + -ing. As a synonym for wonderful, the term first appeared in early 20th-century USA, and possibly derives from the sense of smash used in smash hit and similar terms. Popular folk etymology connects the term to the Irish is maith sin or Scottish Gaelic 's math sin ("that is good"), but this has been described as "improbable", and does not appear in most dictionaries.
- Serving to smash (something).
- The boxer delivered a smashing blow to his opponent's head.
- (originally US, now Britain and Ireland, slightly dated) Wonderful, very good or impressive.
- We had a smashing time at the zoo.
smashing (plural smashings)
- Gerund: The action of the verb to smash.
- Some Greek dance is traditionally accompanied by the smashing of crockery.
- ^ 2004, T. P. Dolan, A Dictionary of Hiberno-English: The Irish Use of English, page 217