head trip

noun4

1. •
   (informal) An experience or set of experiences which is intellectually challenging or stimulating.

   • Not that Martin is a sun-bleached hippie philosopher, but his book is a head-trip as well as a hugely entertaining travel adventure along the eccentric orbits of cosmological research. — 2009
2. •
   (informal) A disorienting, exciting experience, especially one consisting mainly of striking sensory impressions.

   • Part picture book, part head trip. "Magic Eye" presents 22 color images called "single-image random-dot stereograms." When looked at in a certain way, they spring mind-bending surprises on the viewer. — 1994
3. •
   (informal) A state of mind in which one is distracted, disturbed, or unnerved, whether self-induced or resulting from ill-treatment by others.

   • "I think the pressure of being center stage has a lot to do with it. . . . He's got the talent. He's just got to shake off this head trip." — 2000
4. •
   (informal) An ego trip.