A weed whacker is a machine that goes back and forth back and forth and it spreads the seed everywhere.

除草机是一种来回移动的机器，它把种子撒得到处都是。

Did you get a haircut or did your head get stuck in a weed whacker?

你理发了吗？还是你的头卡在除草机里了？

A " weed whacker" has nothing to do with marijuana.

“除草机”与大麻无关。

Now, why is Alan asking Doris if she had her head stuck in a weed whacker?

现在，艾伦为什么要问多丽丝， 是不是她的头卡在了除草机里？

Alan asks Doris – not seriously, but as a way of insulting her or saying something bad about her – if she got a haircut or if her head got " stuck in a weed whacker."

艾伦问多丽丝——不是认真的，而是一种侮辱她或说她坏话的方式——她是否剪了头发， 或者她的头是否“卡在了除草机里” 。