breadcrumber noun [C] UK /ˈbred.krʌməʳ/ US /ˈbred.krʌmɚ/
someone who contacts another person very infrequently

For anyone who’s ever dated, or maintained any kind of relationship in the digital age, you have probably known a breadcrumber. They communicate via sporadic non-committal, but repeated messages – or breadcrumbs – that are just enough to keep you wondering but not enough to seal the deal (whatever that deal may be.)
[New York Times 10 July 2016]

inconvenience fee noun [C] UK /ˌɪn.kənˈviː.ni.əns.fiː/ US /ˌɪn.kənˈviː.n.jəns.fiː/
an amount of money paid to make up for causing someone problems or trouble

Mariah Carey is demanding a $50 million dollar inconvenience fee from her ex-fiancé James Packer. Now that the couple has broken up, Mariah feels as though she wasted her time with the Australian businessman and wants to be compensated for the time she lost.
[www.celebdirtylaundry.com 31 October 2016]

sleep divorce noun [U] UK /ˈsliːp.dɪ.vɔːs/ US /ˈsliːp.dɪ.vɔːrs/
an arrangement where a couple chooses to sleep in separate beds or bedrooms

Relationship counsellor Dr Nandini Roy says, “I’ve seen many women and men say that though they love their partners a lot, sometimes they … would love to sleep separately. To keep your relationship going, you should consider sleep divorce whenever you feel the need to sleep alone.”
[The Times of India 23 March 2016]

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adulting noun [U] UK ‘æd.ʌlt.ɪŋ US ə’d.ʌlt.ɪŋ
doing things that are associated with being an adult

A few nights ago, I got home from work and sat on my bed, scrolling through Twitter. I didn’t get far in my timeline before I saw a tweet from a twentysomething who said she was “adulting” because she cooked herself dinner. Ugh.
[Cosmopolitan 20 June 2016]

bird’s nest parenting noun [U] UK ˌbɜ:dz.nest.ˈpeə.rən.tɪŋ US ˌbɝ:dz.nest.ˈper.ən.t̬ɪŋ
an arrangement where the children of a couple who have separated remain in the family home and their parents take it in turns to live with them there

Instead of moving the children each weekend or each month, ‘bird’s nest parenting’ sees the mother and father do the rotating in and out of the home – while the children remain the constants.
[www.dailymail.co.uk 17 October 2016]

sharenting noun [U] UK ‘ʃeə.rənt.ɪŋ US ‘ʃe.rənt.ɪŋ
using social media excessively to share information about one’s children

In the United States, according to a survey, 90 per cent of two-year-olds have a presence on social media … The UK is going the same way. There is a commensurate rise in concern that sharenting — obsessive peacocking about your offspring’s looks, sporting achievements and toilet-training schedule — could be damaging. 
[The Times 05 November2016]

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