Definition of no or not room to swing a cat in English:

no (or not) room to swing a cat

humorous Used in reference to a very confined space: there’s not even room to swing a cat!
[cat in the sense 'cat-o'-nine-tails']
More example sentences
  • You don't need to have been inside a dog trap yourself to understand that there isn't room to swing a cat in there,
  • We have a splendid cabin and there's plenty of room - but in most places there isn't room to swing a cat.
See parent entry: room

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Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily