"Not enough room to swing a cat"
Meaning: a confined space
Origin: Many people incorrectly think that this is a reference to the old Navel punishment of the 'cat of nine tails', however the phrase has been found in use long before that punishment was ever metered out by the Navy. In fact the phrase refers to the practice of putting a cat in a sack then suspending the sack from a tree, swinging the sack and then using it for archery practice.
Example: This room is too small, there's not enough room to swing a cat.
Like I said, fun for all! Sorry for being obscure there, Clary. Skip-Bo is fun too, I used to love it.