The term 'excessively charming' can be broken down into two crossword solutions: ARTSY (5 letters) and OILY (4 letters). ARTSY is an adjective that describes someone who is creative, imaginative, and has a strong appreciation for the arts. OILY is an adjective that describes something that is covered in or saturated with oil. Together, these two words describe someone who is overly charming, likely in a superficial way.