swing a cat 

It derives from the British Royal Navy when the punishment of whipping with a cat of nine tails was administered on the poop or upper deck of a ship as on the main decks below there wasn't room to swing a cat

i.e. a confined space may be defined as not having enough room to swing a cat

swing a cat by Bob Ventham May 4, 2008

no room to swing a cat 

Not very much space

How do you expect all four of us to stay in that room? There's no room to swing a cat in there.

no room to swing a cat by Dramaturgist August 6, 2018

swing a dead cat

Silly way of relating the quantity or frequency of something in terms of whether you would hit one if you swung a dead cat.

You can't swing a dead cat in that school without hitting some guy with his underwear showing.

swing a dead cat by Coell September 23, 2005

Swing a dead cat

A phrase used to describe when there are a lot of something in a small area and that running into them is unavoidable. Seems to be popular with people from the burrows of Philadelphia.

"there are so many coffee joints here that you cant swing a dead cat without hitting one."

Swing a dead cat by Daddy Long Legs September 18, 2016

Can't swing a dead cat. 

When you live in such a small town that you run into someone you know EVERY time you go out. Short for "you can't swing a dead cat by the tail without hitting 2 people you know." Basically means you live in too small a town. In gestured form is done by a circling of one hand in the air like a lassoing action.

I went out to eat with my friends and the waitress comes over and says, "hay, I went to high school with you." My friend says, "you can't swing a dead cat."

Can't swing a dead cat. by kraash October 17, 2006

Catch a mood swing 

To suddenly find yourself having unexpected sex with someone.

If you’re going to your exe’s house, don’t catch a mood swing bro!

Catch a mood swing by Flurona 2.0 January 4, 2022