Sexy definition: concerned predominantly or excessively with sex; risqué.. See examples of SEXY used in a sentence. Looking for a movie to watch with a little (or a lot) of spice? Stream one of these sexy movies tonight on Netflix, Hulu, Amazon Prime and more. Define sexy . sexy synonyms, sexy pronunciation, sexy translation, English dictionary definition of sexy . adj. sex·i·er , sex·i·est 1. Arousing or tending to arouse sexual desire or interest. 2. Slang Highly appealing or interesting; attractive: "The recruiting... Sexy is an adjective to describe a sexually appealing person (or thing), primarily referring to physical attractiveness. It may also refer to: " Sexy ", a song by Les Jumo feat. Mohombi.