Reply required
In emails, RR stands for "reply required." When you see RR in an email's subject line or at its end, you should make sure to reply to that email ASAP.
While RR has a variety of alternate meanings, including "reply requested," "read and reply," and "receipt request," all are meant to prompt a reply to a sender's email. Typically, someone who includes RR at the end of their message (or EoM) has sent you urgent or important information. Your reply is meant to confirm that you received the message.
Example
RR: Would you rather fight 100 duck-sized horses or 1 horse-sized duck?
A person who is about to send an email marked RR
Related Slang
| EOM | End of message |
| ASAP | As soon as possible |
| NNTR | No need to reply |
| NN2R | No need to reply |
| VSRE | Very short reply expected |
| NRN | No reply necessary |
| MMB | Message me back |
| LMK | Let me know |
| NYR | Need your response |
