goo v. colloq. a viscid or sticky substance; sentimental tripe; object oriented language for use in unix applications.
goo (yes, no capital 'g') is an object-oriented language designed to be embeddable in any applications requiring an object-based script language. It's especially aimed at applications which are expected to have long (or infinite) uptimes and may have multiple simultaneous users.
Its own developer, Robey Pointer calls Goo a defunct scripting language.