head trip

Noun

 * 1)  An experience or set of experiences which is intellectually challenging or stimulating.
 * 2) * 2009 July 10, Martin Fletcher, "Beware Invisible Cows, By Andy Martin" (book review), The Independent (UK) (retrieved 23 Aug 2014) :
 * 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.
 * 1)  A disorienting, exciting experience, especially one consisting mainly of striking sensory impressions.
 * 2)  A state of mind in which one is distracted, disturbed, or unnerved, whether self-induced or resulting from ill-treatment by others.
 * 3)  An ego trip.
 * 1)  A state of mind in which one is distracted, disturbed, or unnerved, whether self-induced or resulting from ill-treatment by others.
 * 2)  An ego trip.
 * 1)  An ego trip.