black fax
n. A black piece of paper faxed to a company as a prank or as retaliation for distributing junk faxes.

Example Citation:
"Exasperated victims are finding unusual ways of fighting back. Those unable to contact the junk-fax firms have been known to vent their frustrations on companies featured in the ads. Some, for instance, have tied up the fax machine of Toronto-based Value-Rite Business Products by repeatedly sending the same document, says marketing manager Jay DeGenova. Others have used up his toner by sending a solid-black fax 20 times."
—John Schofield, "Unsolicited and often unwanted," Maclean's

Related Words: