H9
H9 definition by Slang.net
This page explains what the slang term "H9" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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If you see your SO use the abbreviation H9, you might want to review the rest of their messages. H9 stands for "husband in room" - it's a code chatters use to let others know their husband could be reading their messages.
H9 is similar to C9, a code that kids use to tell others their parents are in the room. In both cases, chatters use these codes to ensure those they're talking to don't say anything the interested party is not meant to see.
However, while kids keeping secrets from their parents is pretty standard, a spouse keeping secrets from their husband is not. So if you are a husband whose spouse is sending H9 messages, you likely have better things to do than continue reading this definition ...