>>Ive accidentally said that hs is evil in the moment of anger<<
How does one "accidentally" speak? You spoke what was on your mind.
Yes that is the biblical meaning of blasphemy
See the biblical facts:
Mat 12:31 ¶ Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Mat 12:32 And whosoever speaketh a word against the Son of man, it shall be forgiven him: but >>>whosoever speaketh evil against the Holy Ghost,<<< it shall not be forgiven him, neither in this world, neither in the world to come.
Its Greek blasphemia meaning:
1- slander, detraction, speech injurious, to another's good name
2- impious and reproachful speech injurious to divine majesty
The Lord God hath spoken it