This means you are right in the middle of doing something. It also means an event is at its busiest point.
Verb [て-form] + いる + 最中だPrimary
Noun + の + 最中だ
This means you are right in the middle of doing something. It also means an event is at its busiest point.
会議は今、まさに議論の最中です。
The meeting is right in the middle of a discussion now.
電話がかかってきた時、シャワーを浴びている最中だった。
When the phone rang, I was right in the middle of taking a shower.
今は大事な試験の最中だから、邪魔しないでください。
I'm in the middle of an important exam right now, so please don't disturb me.
犯行の最中ではなかったので、現行犯逮捕はできなかった。
He wasn't in the middle of committing the crime, so a flagrante delicto arrest was not possible.
引っ越しの最中だから、家の中はめちゃくちゃだよ。
We're in the middle of moving, so the house is a complete mess.
This grammar shows something is happening right now. It is like being in the middle of a big project. It means you are very busy. It is not a good time to stop.
This is different from 〜最中に. That phrase tells when something else happened. This phrase means something is happening right now. It is also different from 〜ているところだ. This phrase means the action is more intense. It can also sound more formal.
Don't use this when an action happens very fast. For example, you can't say "in the middle of waking up." You use it for things that take time.
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