Agnostic means "one who does not know," one who is ignorant of what is true. I have always found that a person who applies the moniker to themselves, takes pride in the fact that they are an Ignoramus!
Though one can say that they are "
," if they argue passionately from that position they are really no longer "agnostic" but uncommitted "atheist's." Either God exists or He does not. Living and believing in a way that does not reflect that God exists, is unbelief, not some fanciful neutral "middle ground."