butt of joke是什么意思

butt of joke
烂笑话
例句：
So the poIice officer's the butt of your joke.
那么警察只是你的一个笑柄而已？
The vagina is many things but it shouldn't be the butt of a joke.
阴道可以意味着许多东西，但不应该是笑柄。
Oh, my god, you must have been the butt of every joke.
哦，天哪，你一定在开玩笑。