It's definitely Freud. Anyway, his theories certainly aren't fact. I mean he has a whole theory of childhood and I think he only ever studied one child. His case studies were almost exclusively middle aged, middle class women with hysteria. Also, his methods- free association, dream analysis and hypnosis are very unscientific.
He did make some interesting points though. I think he might be mainly right about defence mechanisms.
I don't remember making any Freudian slips though I'm sure I have. But I used to be really naive when I was younger and said things which I didn't realise the meaning of. I don't think that's quite the same as a Freudian slip though.