Blacklist

Black·list

Blacklist

v. t.
  1. 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.