When shopping in Asda, Peterborough, my second in command randomly declared that she needed to purchase some sowts (which could perhaps also be pronounced sowse). 

Now, my second in command has lived in the northeast for a few years, so our once occasional communication issues are now quite rare. Many attempts were made to convey the meaning of the word to me, but all failed. After a lengthy laughing session, my second in command found a way to explain the nature of a sowts. 

Bath salts.