1. What is g9 short for?


To quickly say "goodnight" to someone at the end of a text or chat conversation, just send G9. This abbreviation is an informal way of signing off and wishing someone a pleasant evening.

If you don't understand why G9 means goodnight, say G9 out loud real fast. If you speak quickly enough, you should understand why some texters and chatters use G9 and goodnight interchangeably.


"G9, hope u sleep well!"

You save seven characters when you condense goodnight to G9

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Last Updated: June 22, 2021

2. What is g9 short for?


An abbreviation that is slang for "genius," both online and offline.


"Thanks for fixing my computer again, you're a G9!"

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Last Updated: April 1, 2014

G9 definition

This page explains what the abbreviation "G9" means. The various definitions, examples, and related terms listed above have been written and compiled by the Slangit team.

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