A high five given to someone after they make a freudian slip.
Joe: I'm lucky that my girlfriend and I haven't had any major sex. Wait! I mean setbacks!
Bob: High freud!
When, due to using copious amounts of two kinds of drugs simultaneously, your thoughts begin to reflect and apply your deep seated biases to your understanding of the nature of the world in such a way that still persists once sober.
I wish I never got high as Freud.