Lily's learned a new phrase to ignore!
When a cat is sat on my lap, and I want to get up, I usually speak first. Not that they understand English, but a little warning can avoid them digging their claws into me in panic at sudden movements.
I use the words "excuse me", and when I say that to Lily, her ears go back, and her tail thumps two or three times. I've left it half a minute and tried again, and the same thing happens, over and over.
She probably thinks I don't notice!