RR: Would you rather fight 100 duck-sized horses or 1 horse-sized duck?
|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|
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.