My mother had so many words of her own invention that I once wrote a small dictionary as a kind of satire. For example, she never used pints or litres. Rather, liquids were measured in 'squarts' 'sups' and 'sqooshes' Washing up liquid was 'squz'

For example "put a good squart of squz in the dishes when you're washing them"

"...and don't forget to skoosh them round" (I suppose the nearest translation would be 'agitate')

Juts in case you think all her words began with 's':

"Shake out your livers and wash off the coshapookas"

(trans: 'get up out of bed, get your circulation going / get some air, empty your bladders & wash the snots out of your nose')

This might be said to lazy children lying-in on a Saturday morning.

There were many, many more. Can't remember all of them these days.