dog my cats 见鬼；喵了个咪，一般属于语气词，带有一点纠结复杂的心情。

【例句】
Why, dog my cats, they must a been a house-full o' niggers in there every night for four weeks to a done all that work, Sister Phelps.
为什么？喵了个咪的，要干完所有这些活儿，须得一屋子挤得满满的黑鬼，用四个星期，每晚每晚地干，费尔贝斯大姐。

I began to feel sorry for Hubby, dog my cats if I didn't.
我开始觉得对不起贺比了，喵了个咪的，之前都没这么觉得。