astral divorce noun [C]
UK /ˈæs.trəl.dɪˈvɔːs/ US /ˈæs.trəl.dɪˈvɔːrs/
a type of therapy session during which someone is helped to move on from a past relationship that is still causing them unhappiness

Astral divorces are a “cutting of ties and contacts” with a past relationship and are performed by psychics. The aim is to rid you of old, residual energy from an ex that may be holding you back and to help move you into a new phase of your life, ready for love again.
[Sunday Times, 10 September 2017]

LAT noun [U]
/ˌel.eɪ.ˈtiː/
abbreviation for living apart together: a type of close romantic relationship where the partners choose not to live together

Recent research demonstrates that there are other ways of establishing long-lasting, high-quality relationships without committing to marriage or living together. However, U.S. society has yet to recognize LAT as a legitimate choice. If more people—young and old, married or not—saw LAT as an option, it might save them from a lot of future heartache.”
[www.sciencedaily.com, 9 February 2017]

stashing noun [U]
/ˈstæʃ.ɪŋ/
the practice of not telling anyone about the person with whom you are in a romantic relationship

Stashing is a super fun dating trend in which someone is dating someone else, but has decided to hide them away from everyone in their life … A victim of stashing is hidden from every other part of the stasher’s life – from their tagged photos to their casual chats with their parents. Why? Because that way, they’re able to pretend that they’re not really dating the person they’re stashing, meaning they can justify getting with other people, doing whatever they fancy, and being generally inconsiderate and awful.
[Metro, 19 August 2017]

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