Shine on You crazy Diamond
A Pink Floyd album partly dedicated to one of their former members who took too much psychedelics and went off the rails. Sometimes used to refer to someone who went off the deep end with psychedelic/drug use.
Example:
Person 1: Whatever happened to our friend Gary?
Person 2: Last I heard of him he took too much LSD and, well... Shine on You crazy Diamond.
Person 1: Damn
Person 1: Whatever happened to our friend Gary?
Person 2: Last I heard of him he took too much LSD and, well... Shine on You crazy Diamond.
Person 1: Damn