When an adult finds a minor sexually attractive and/or some times have a relationship which could land the other person in jail for. Most common examples are between teens who are not legally who have sex and adults.
guy 1: Have you seen guy 3's sister she is one sexy piece of ass.
guy 2: Dude she is total jail candy.
guy 1: I thought she was legal already!
guy 2: Nah man she's 16....