Orange background with a female and male face outlined in black facing each other
IDY is an abbreviation for "I Dig You." To “dig” someone or something means that you approve or like that person or thing. Dig being said in this manner can also mean “to understand,” a use first recorded in 1934.
“Dig.” Online Etymology Dictionary , Douglas Harper, idioms.thefreedictionary.com/dig you. dig you. (n.d.) Farlex Dictionary of Idioms. (2015). Retrieved July 31 2020 from https://idioms.thefreedictionary.com/dig+you