Spippy Kwazz
To be obviously mad and very crazy. Especially in public places. To be sane challenged.
The tramp just ran at me screaming with his guitar in one hand and half bottle of white lightening in the other, I just stood there petrefied, however once he had reached me he simply leant across and asked me for 5 pence. He was, for sure Spippy Kwazz.