"고기를 먹지 맙시다."

Translation: Let's not eat meat.

[Origamipie]

I'm disinclined to acquiesce to your request.

[williamleitzman]

비건 합시다 :)

[CarlaBrigita]

but it's too delicious

[Jasondedde]

Is there no 은 / 는 particular be ause thay would be on the "우리(는)"?

I need Ash Fred for this! 도와주세요!

[entraptah]

That's right.
The verb implies a suggestion to the people listening to it, so the subject is implied there "us (we)".

[esowers4]

I don't understand why it translates to "lets not". Which word is the "lets"?

[entraptah]

This verb form is a suggestion, a request...
I guess it's roughly translated
When you want your friends to do something how do you ask them?

For example: Let's not go to Mc Donalds today.

In Korean, you can't translate everything word by word.

[Onceblinkmoaarmy]

Notice how it is 맙시다 not 맙니다