As parents get older, they start substituting words. Years ago my mother swapped "Specific" with "Pacific", and "Art Nouveau" has pretty much always been "Art No View".
Someone clever just told me this is called "Mummification".
Her latest trick is to replace "Yank" with "Wank".
I first heard her say "oh, just wank it over the washing line".
I found this boggling. Later, when Dad finished a bottle of wine she told him, "Just wank it out the window. I'll scrape it up later."
My mum's gone all salty. She's never been exactly prim, but when Dad offered her a crisp, she yelled "Aw, stuff it in my gob, big boy."
In 20 years, she's going to be the terror of the retirement home.