Ask HN: Pure Lisp / Lisp syntax without parentheses?

I just had a very confusing conversation with a new acquaintance. He's a bit of a Microsoft-head, and works in finance. So far so good.

Then he goes off to say stuff like "I love Pure Lisp... after starting with Common Lisp but hating all the brackets, then Pure Lisp is great", which left my brain so confused I didn't know what to say. I'm pretty much sure he meant 'parentheses', not "brackets". But is there a single 'something' in the Microsoft world that's called Pure Lisp? And does it have a syntax that isn't s-expressions?