Not enough room to swing a cat

(Li is accompanying Finn as he goes flat hunting)

Finn: This is flat number five, Li. I'm happy you came along to help me find a nice place to live.
Li:Renting a new place is a big step, Finn. This one looks good. Look here. Big windows, lots of light coming in. Isn't it nice?
Finn: Yeah. It's good but ... 
Li: It's been painted recently. Look, the wooden floor is lovely!
Finn: Yes, you're right, it's lovely but ... Li ... there's not enough room to swing a cat!
Li: A cat? Are you sure? No problem. I saw one outside. I'll be back in a minute.
 (She leaves the room for a few seconds)
Finn: Li, what is this?!
Li: It's a cat, Finn. I didn't know you liked swinging cats around, but ... well, this cat was just outside and you can try swinging it! Just be gentle with it.
Finn:No, Li. I don't swing cats. In English, you use the expression 'there's not enough room to swing a cat' when you want to say a place is much too small.
Li:What a relief!
Finn: 'Not enough room to swing a cat' is today's expression in The English We Speak. Let's hear some examples of how to use it.

Examples

Finn: So, not enough room for me in this flat, Li. But thanks for coming with me all the same.
Li: So what are you going to do, Finn?
Finn: I think I'll just move in with my brother.
Li: Is his flat small? Could you ... swing a cat there?
Finn: In my brother's house cats rule! He loves furry little animals.
Li: Well, I think this cat might join you there. Let's go, Finn. Bye.
Finn: Bye. And no cat was harmed in the recording of this programme. Isn't that right, Tubby?
Tubby: Meow.