J5M

Just Five Minutes

This term is most likely used when asking someone to wait or to hold.

Online jargon, also known as text message shorthand, used in texting, online chat, instant messaging, email, blogs, and newsgroup postings, it is spelled in all lowercase because it's also considered a form of leetspeak.

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See also : BRB  
NetLingo Classification: Acronyms and Text Message
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