To answer this question, let us turn to the Word of God to define exactly what a ‘Reprobate Mind’ is for itself…
New International Version
Furthermore, just as they did not think it worthwhile to retain the knowledge of God, so God gave them over to a depraved mind, so that they do what ought not to be done.
New Living Translation
Since they thought it foolish to acknowledge God, he abandoned them to their foolish thinking and let them do things that should never be done.
English Standard Version
And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done.
King James Bible
And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
Holman Christian Standard Bible
And because they did not think it worthwhile to acknowledge God, God delivered them over to a worthless mind to do what is morally wrong.
International Standard Version
Furthermore, because they did not think it worthwhile to keep knowing God fully, God delivered them to degraded minds to perform acts that should not be done.
GOD’S WORD® Translation
And because they thought it was worthless to acknowledge God, God allowed their own immoral minds to control them. So they do these indecent things.
Jubilee Bible 2000
And even as they did not like to retain God in their knowledge, God gave them over to a perverse understanding, to do those things which are not convenient,
Young’s Literal Translation
And, according as they did not approve of having God in knowledge, God gave them up to a disapproved mind, to do the things not seemly;
God gave them over to a reprobate mind; or, an injudicious mind, a mind void of judgment. It is just and equal, that he, who in his judgment disapproves of God, should be left either to be of a corrupt judgment, or of none at all.
The word may be taken passively, for a mind disapproved of God; or actively, for a mind which disapproves of all good. They were not given up to this reprobate mind all at once, but by degrees.
First, they were given up to their own hearts’ lusts, Romans 1:24; then, to vile affections, Romans 1:26; and then, lastly, to a mind void of judgment; to such an evil habit, that they could do nothing but evil.