used by the speaker to express his awareness that something he has just said or is about to say is phrased too sharply: Lord (God) forgive me.
«Чернышевского не читал, а так, если подумать... Прескучная, прости Господи, фигура!» (Набоков 1). Tve never read Chernyshevski, but when I come to think of it.... A most boring, Lord forgive me, figure!" (1a).