It was my longest motorcycle ride yet, at about 175 miles, and I experienced freezing my ass off for the first time too.

这是我骑摩托车最长的一次，大约175英里，我第一次感觉自己的屁股都快冻僵了。

youdao

I jumped back and fell on my ass.

我往后一跳，摔了个屁股墩。

《柯林斯英汉双解大词典》

Mom: Stop kissing my ass, you little man.

不要再拍我马匹了，你这个小个子。

youdao

He comes by about once a quarter to blow a little sunshine up my ass.

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In cyberspace, a group called PUMA (Party Unity My Ass) says things about Mr Obama that would make most Republicans blush.

ECONOMIST: Barack Obama struggled this week to unite his party

Forgot to put on my pants and fell flat on my ass.

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