Is there a compiled programming language with dynamic, maybe even weak typing?

I wondered if there is a programming language which compiles to machine code/binary that features dynamic and/or weak typing (not bytecode then executed by a VM, that's something completely different when considering typing), e.g:

Think of a compiled language where:

• Variables don't need to be declared
• Variables can be created during runtime
• Functions can return values of different types

Questions:

• Is there such a programming language?
• Why / Why not?

I think that a dynamically yet strong typed, compiled language would really sense, but is it possible?

I believe Lisp fits that description.

http://en.wikipedia.org/wiki/Common_Lisp