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10-9 is a police, and other 10 code using service, which has a meaning the same as, "repeat" or "say-again"
Can you please 10-9 your last transmission, It was a little 10-1 (distorted, broken up).
by Chris October 25, 2004
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A number added to the end of the username, bitchtitties. Often used by a group of gay kids.
"Hey I just got Instagram! The username is bitchtitties109"
via giphy
by Fisheyfishsticks August 18, 2016
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