know someone or something like the palm of one’s hand know someone or something like the back of one’s hand; know someone or something like a book
know someone or something like the palm of one’s hand know someone or something like the back of one’s hand; know someone or something like a book to know someone or something very well. รู้จักคนนั้นๆหรือสิ่งนั้นๆเป็นอย่างดี
