Why was the washing machine laughing?
It was taking the piss out of the knickers!
Laughing Washing Machine
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is funny because "taking the piss" is a British slang term that means making fun of someone. The washing machine is laughing because it's washing the knickers (underwear). So, it's literally "taking the piss" out of them. Get it now, you cotton-headed ninny muggins?