Cavespeak for "having sex", "Do you want to have sex," "sex," or any reference to sex. (From "Caveman", the Ringo Starr / Dennis Quaid 1981 prehistoric comedy.)
Cavespeak has no grammar or sentence structure (or written form). Therefore only uses of zug-zug are: "Zug-Zug?" "Zug-Zug." or "Zug-Zug!"
by Sagebrush April 11, 2003