cusper

From cusp + -er.

cusper (plural cuspers)

1. A person considered to have been born on a cusp between significant generations.

   Millennial cusper

   • 2004, Linda A Panszczyk, HR How-To—Intergenerational Issues:

     When the younger of their two overlapping generations feels like it's not being heard, a Cusper can provide a voice.

   • 2017, Hannah L. Ubl, Lisa X. Walden, Debra Arbit, Managing Millennials For Dummies, John Wiley & Sons, →ISBN, page 266:

     Cuspers are natural translators because they often speak the language of two generations. Sometimes we even call them generationally bilingual!

2. (astrology) A person born on a day at a junction of star signs.
   • 1989, Liz Greene, Astrology for Lovers‎^[1], Red Wheel Weiser, →ISBN:

     And if you were borm on those tricky days which fall between two signs — like 23 December, or 21 May — then you are called a ‘cusper’, a person born on the cusp of two signs, and said to partake a little bit of both.

• Spruce, recups, spruce