Top Definition
Twenty-one backtick is how you say the text " 21` " which is typed by hitting the three top-left keys from right to left on a standard English Keyboard: 2, 1, and backtick
Used in IM to mean over and out.
Guy 1: OK, I'll see you in like 5 minutes
Guy 2: k, 21` twenty-one backtick
by Nizzity June 28, 2007
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