Okay folks. Question time!

What's your favourite malapropism?

Today I learned that "spitting image" is a malapropism! But we're not sure if it comes from "spit and image" (from "he's the very spit of..." someone else), or - and I think this makes more sense - *spirit and image*, deformed over time. But so many forms have been used, no one knows for sure!

Other fun ones:

On tender hooks ("tenterhooks")
A Freudian slip is when you say one thing but you mean your mother.

What's your favourite?