blasphemy

n. (pl. -ies) 1 irreverent talk or treatment of a religious or sacred thing. 2 instance of this.  blasphemous adj.

n. An indignity offered to God in words, writing, or signs; impiously irreverent words or signs addressed to, or used in reference to, God; speaking evil of God; also, the act of claiming the attributes or prerogatives of deity.