Ya wouldnt swing a cat 'n it

exp.

Heard in Donegal

Used to descride a small space or if there was a large crowd of people in a place and it was hard to move around.

In use

Th'on house he built is very small, ya wouldnt swing a cat in it

Posh English

The habitation he constructed is exceedingly diminutive. One would struggle to turn about in it.