slip of the lip
Also, slip of the tongue or pen. An inadvertent mistake in speaking (or writing), as in It was just a slip of the lip that made me say the wrong name, or She didn't mean it; it was a slip of the tongue, or He intended to write “the honorable” but a slip of the pen turned it into “reverend.” The usage with pen dates from the mid-1600s; the others are a century or so younger.
Words nearby slip of the lip
slip flow,
slip form,
slip gauge,
slip hook,
slip joint,
slip of the lip,
slip one's mind,
slip out,
slip rail,
slip ring,
slip road