-Removed-But even if Freaky quoted the appropriate verses you wouldn't recognize them. You probably believe what your mentor said about the name Jesus Christ being coined by a wise man bumping his head on a beam in a stable.
FMF used Christ's name in vain, and you didn't even see it.
See if you can fathom this.
Isaiah 26: 19
Thy dead men shall live, together with my dead body shall they arise. Awake and sing, ye that dwell in dust: for thy dew is as the dew of herbs, and the earth shall cast out the dead.
Paul referenced that verse in Ephesians 5:14
Wherefore he saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light.
Wake up divegeester.
-Removed-"Blasphemy (Greek blaptein, "to injure", and pheme, "reputation" ) signifies etymologically gross irreverence towards any person or thing worthy of exalted esteem." -- New Advent
Calling out the name of God, or, in Christianity, Jesus Christ, when you bump your head of for some other trivial reason is such irreverence as defined above. When intentionally done by a non-believer in the hearing of believers, it is mockery. However, there may be believers who are not bothered by it. Is it OK for them not to be bothered by it?