By a slip of the tongue one can sometimes put oneself in a rather peculiar position.
He is trying to make a point out of a slip of the tongue which has already been explained to him.
I am sure that it was a slip of the tongue when she suggested otherwise.
By a slip of the tongue at one stage he referred to a capital charge.
Was that true, or was it a slip of the tongue?
I thought that it was a slip of the tongue.
In fairness to him, we also heard him say that that was a slip of the tongue and was unintentional.
I know that in his more quiescent moments he would not have made such a slip of the tongue.