Source : Webster's Revised Unabridged Dictionary (1913)

Blacklist \Black"list`\, v. t.
   To put in a black list as deserving of suspicion, censure, or
   punishment; esp. to put in a list of persons stigmatized as
   insolvent or untrustworthy, -- as tradesmen and employers do
   for mutual protection; as, to blacklist a workman who has
   been discharged. See {Black list}, under {Black}, a.

         If you blacklist us, we will boycott you. --John
                                                  Swinton.

Source : WordNet®

blacklist
     n : a list of people who are out of favor [syn: {black book}, {shitlist}]
     v : put on a blacklist so as to banish or cause to be boycotted;
         "many books were blacklisted by the Nazis"