Is taking the Lord's name in vain a sin?
Thou shalt not take the name of the Lord thy God in vain; for the Lord will not hold him guiltless that taketh his name in vain. Keep yourselves from evil to take the name of the Lord in vain, for I am the Lord your God, even the God of your fathers, the God of Abraham and of Isaac and of Jacob.
They join the long-standing evils of lust, gluttony, avarice, sloth, anger, envy and pride as mortal sins - the gravest kind, which threaten the soul with eternal damnation unless absolved before death through confession or penitence.
"If you say something like 'Oh my God,' then you're using His name in vain, but if you're saying something like OMG it's not really using the Lord's name in vain because you're not saying 'Oh my God. ' It's more like 'Wow.
or take the Lord's name in vain. to use God's name disrespectfully, especially by swearing.
In the Book of Matthew (12: 31-32), we read, "Therefore I say to you, any sin and blasphemy shall be forgiven men, but blasphemy against the Spirit shall not be forgiven.
- Its subject matter must be grave. ...
- It must be committed with full knowledge (and awareness) of the sinful action and the gravity of the offense.
- It must be committed with deliberate and complete consent.
As a general rule, Catholics are obliged to attend Mass each Sunday. This is in fulfillment of the Second Commandment. Simply watching Mass on TV does not fulfill the obligation. A Catholic who can reasonably do so must attend Mass at a parish church or oratory.
Because the Eucharist is a sign, symbol, and expression of communion with God, the Church has always taught that a person who is conscious of grave sin should not ordinarily receive the Eucharist without first making a sacramental confession.
Rev. Graham: Only one sin that can't be forgiven is on God's list — and that is the sin of rejecting Him and refusing His offer of forgiveness and new life in Jesus Christ. This alone is the unforgivable sin, because it means we are saying that the Holy Spirit's witness about Jesus is a lie (see Luke 12:10).
“Oh my God!” The expression, once considered taboo in polite conversation, has become as commonplace as “that's cool” or “see you later” in American parlance.
What is swearing to God?
DEFINITIONS1. used for emphasizing strongly that you are telling the truth. I swear to God I was never at that place. Synonyms and related words. Ways of emphasizing that something is true or exact.
Blasphemy, in a religious sense, refers to great disrespect shown to God or to something holy, or to something said or done that shows this kind of disrespect; heresy refers a belief or opinion that does not agree with the official belief or opinion of a particular religion.

What Do I Say to People Using God's Name in Vain? - YouTube
One of the ways God's name is misused is through profanity. Webster's dictionary defines profanity as to violate or treat with irreverence or contempt something regarded as sacred. The word literally means “before the temple.” So, a profane word is one you would not use in church.
What are the seven deadly sins? According to Roman Catholic theology, the seven deadly sins are the seven behaviours or feelings that inspire further sin. They are typically ordered as: pride, greed, lust, envy, gluttony, wrath, and sloth.
According to Catholicism, a venial sin is a lesser sin that does not result in a complete separation from God and eternal damnation in Hell as an unrepented mortal sin would.