MIND SOMEONE ELSE'S BUSINESS is an expression used to describe the act of prying into or snooping around in someone else's affairs without their permission. This phrase can be broken down into two crossword solutions: PRY (3 letters) and SNOOP (5 letters). PRY is defined as to look at or inquire into something that is none of one's business, while SNOOP is defined as to search or investigate something secretly or inquisitively.