Blasphemy
Blasphemy was something that was seen as being offensive towards a god or a religion as a whole.

According to the Vulcan Elder it would be blasphemy to enter the reliquary in the catacombs beneath the monastery at P'Jem. Following the  of the secret listening post beneath the  this claim was considered wrong. ()

In 2369, Q told a seemingly-deceased Jean-Luc Picard that Q was God, to which Picard scoffed. Q referred to this as "blasphemy", remarking that Picard was fortunate he did not cast him away or smite him or "something". ()

That same year, Vedek Winn Adami accused Keiko O'Brien's secular teachings of the Bajoran wormhole and the Prophets as being blasphemous. Later, a member of a crowd that followed Winn said that Benjamin Sisko would "pay in eternity for his blasphemy". ()

In 2376, " Mulligan" (The Doctor) called Seamus's attempts to use hypnosis on him "blasphemous". ()

See also 
 Heresy
 Sacrilege
 Taboo

External link 
 

de:Blasphemie
Mythology