CD9
Parents are watching
Example
CD9 for the next 15 or so
Cool, we'll keep it PG then
CD9 definition by Slang.net
This page explains what the abbreviation "CD9" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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In online chat, teens use CD9 to mean "parents are watching." This abbreviation is shorthand for code 9, which means the same thing.
Teens send CD9 to tell those they are conversing with to avoid inappropriate language and topics until their parents leave. At which point, the teen will send CD99, which means "parents are no longer watching."