To start a relationship that has a definedend date; e.g., one of the people is moving soon.
"I hear you started dating some new girl."
"Yeah, but she's moving across the country in a month, so we're planning on breaking up."
"A little expiration dating, eh?"
(n.) the condition of a semi-forced, semi-serious relationship resulting between two people who are going to prom together. This normally includes texting, brief hangouts, and any other activities that would "set up" the night of prom. Normally, such a relationship lasts from the instant when the dates decide to go together until the morning after prom.
A (Japanese) phenomenon that involves a (Japanese) schoolgirl (mostly in high school) dating a middle-aged man for money. It is frowned upon and shouldn't be done.
Kokona was in Shisuta Town doing compensated dating. How awful of her!