A trip brought about by the drug ketamine. It has somethings in common with OBE and astral travel, but often the person does not realise they are tripping or even anything about the reality they usualy frequent, it can be terrifying and twisted, a journey to pseudo enlightenment, a ten frame period of five minuets that repeat them selfs into eturnity or all of these things. It is truely an amasing experence that I can not liken to anything else I have experenced.
Not everyone who has done ketamine has experenced a k hole (as is evident from some of the other definitions), and the words k hole are often used to mean very ketamised and therefore unable to preform simple tasks or have a conversation.
I went in a k-hole flew over green feilds met some people I wouldn't meet in real life for another two months or so at a party, wondered how the fuck I was gonna get out of this circle then I realised that I am dead and death is just a transition and I am eturnal and I felt amasing and liberated. Five hours later I couldn't remember any of that.