'Layby' refers to someone who is in a relationship but looking to get out.Instead of risking a period of singleness when it eventually ends, a layby starts laying the groundwork with other women or men who they might want to date next.
Meaning "to assign to or indicate a date" (of an event) is from c.1400. carbon dating, carbon-14 dating, radiocarbon dating - a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14; believed to be reliable up to 40,000 years from the times of the surgeon who was Jekyll's predecessor; but even as they opened the door they were advertised of the uselessness of further search, by the fall of a perfect mat of cobweb which had for years sealed up the entrance.from a particular hour, his resumption of his campaign after a diplomatic drop, a calculated absence of three nights - of his being definitely followed, tracked at a distance carefully taken and to the express end that he should the less confidently, less arrogantly, appear to himself merely to pursue.Ghosting, the noun, and to ghost, the verb, have been added to the dictionary, and have been defined as "the phenomenon of leaving a relationship of some kind by abruptly ending all contact with the other person, and especially electronic contact, like texts, emails, and chats.""You meet someone at a party and exchange numbers," Merriam-Webster explains."You go on a few dates, and things seem to be going well.