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.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."