Definition of "smasher"

smasher

/smæʃɚ/

noun
countable and uncountable, plural smashers
1. Something that, or someone who, smashes.
  1. (mining, historical) A person employed to break up waste rock.
2. (slang) An attractive person (see also smashing).
  Quotations
  You got engaged on the day that I moved out. It's OK / She's a smasher, perfectly suited to the role
  2019, “Magic of Meghan”, in Sweet Princess EP, performed by Dry Cleaning
3. (slang, dated) Anything very large or extraordinary; a whopper.
4. (UK, slang, obsolete) One who passes counterfeit coins.
  Quotations
  The price of a case (five shillings piece bad) from the smasher is about one shilling; an alderman (two and sixpence) about sixpence; a peg (shilling) about threepence; a downer or sprat (sixpence) about twopence.
  1859, Snowden's magistrates assistant, page 90
5. (UK, slang, obsolete) The counterfeit money itself.