Put me out of my misery

I've been studying programming for 3 fucking years and I STILL don't know what 'foobar' is. FUCK.

>>19
I'm no expert on CL packages, but as I read LISP-SYMBOL-REDEFINITION¹ you need to have every name exported by COMMON-LISP imported at every point of your program because a macro might decide to make use of something in its expansion without the full name.

¹ http://www.lispworks.com/documentation/HyperSpec/Issues/iss214_w.htm