furrfu

excl. [Usenet; written, only rarely spoken] Written-only equivalent of
Sheesh! ; it is, in fact, sheesh modified by rot13. Evolved in mid-1992 as a
response to notably silly postings repeating urban myths on the Usenet
newsgroup alt.folklore.urban , after some posters complained that Sheesh! as
a response to newbies was being overused. See also FOAF.