Does OSAS mean that we can sin all we want and even stop believing in Jesus and still be saved? Because I ran into some who support and or defend this view
No, those who believe in eternal security and the true gospel are born again and dont "want" to sin.
It is shameful and painful, the things we onced took joy from now cause us to suffer and God will chasten us when we need correction... not throw His own children into hell like some falsely believe...
All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
For I came down from heaven, not to do mine own will, but the will of him that sent me.
And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.
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Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.
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For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.