Non-PRO English Art/Literary General / Conversation / Greetings / Letters

Hi everyone!

The term is from St Aubyn's "Mother's Milk". Let me give the context:

Patrick is having a hard time falling asleep. He is caught in a vicious cycle of thoughts. Trying to get rid of it, he gets up, changes rooms and slides into the bed where his wife and little son is sleeping.

"Patrick lay on his side, teetering on the edge of the bed. He certainly wasn’t going to get any sleep in this precarious sardine tin, but if he could just let his mind glide along, he might get some rest; if he could go omnogogic, gaining the looseness of dreams without their tyranny, that would be something. He was just going to forget about the Julia incident. What Julia incident?"

I couldn't find anything about "omnogogic", or even anything close to it. Does anybody have an idea what it can be? Thanks