Being fearful of naming someone or something. The phrase takes cue from the line associated with "Lord Voldemort" in the Harry Potter series: 'he who must not be named'.

The phrase was coined by British activist Maajid Nawaz in context of Islamism; analysts being fearful or reluctant to call out the ideology of Islamism as the underlying cause of Jihadist terrorism.
Left-liberals often succumb to the Voldemort Effect when discussing Islamic terrorism.
by StrikerXX August 3, 2015
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