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## Context

I saw many times people using 落ちる in a chat followed by 後で. I assumed that the
user expressed his intent of temporarily leaving a chat and planned to come
back later.

## Question

  * As the title mentions, is 落ちます an equivalent of "AFK1" with the underlying meaning of coming back later on?
  * Is there a way to differentiate **"I got to go"** ( _I don't plan to come back_ ) and **"I'll be back"** ( _I temporarily leave the chat/game/whatever_ ) 

* * *

1 **AFK** : **A** way **F** rom **K** eyboard
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meaning internet-slang
Internet vocabulary: Is 落ちる an equivalent of "being AFK"?
落ちます is closer to "gotta go now." It usually means _not_ returning for the
day, unless otherwise modified by しばらく, ちょっと, 30分くらい, 飯食ってくるので, etc. A typical
response for 落ちます would be おやすみなさい, また明日, お疲れ様, etc.

後で usually indicates the person who said this somehow knows the other person
is coming back relatively soon. It's not a typical response for 落ちます modified
by nothing.

If you want to explicitly say "I'll be back", you can use すぐ戻ります, ちょっと外します,
しばらく落ちます, etc. Many online gamers will understand "AFK", too.
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落ちる could refer to the Internet connection, meaning the person will leave and
therefore the connection will drop.

I'm taking liberties here but you can think of it as

> （今日のところはこれで。ネット接続が）落ちます。（また）後で。
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answer