Correspondingly, what does saying something in vain mean?
If you do something in vain, you do it with no result, or to no effect.
One may also ask, what does love in vain mean? "Love in Vain" (originally "Love in Vain Blues") is a blues song written by American musician Robert Johnson. He sings of unrequited love, using a departing train as a metaphor for his loss.
Similarly one may ask, what does taken in vain mean?
1. take in vain - use a name, such as God, without proper respect. abuse, misuse, pervert - change the inherent purpose or function of something; "Don't abuse the system"; "The director of the factory misused the funds intended for the health care of his workers"
Is saying OMG bad?
Really it is not. Some (very few) theists consider it blasphemy as it can be interpreted as taking God's name in vain. Others consider it as referring to a non-specific god and thus is insulting to a singular God.
