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1.
When you cross that line, you've done some stupid ass shit like snitch or whatever and are going to pay for it, maybe with your life. In prison anyone who cross that line is in ad seg.

Made popular again by prison guard turned rapper Rick Ross - Akon
Mf'er snitched on all me, he cross that line.
by Sanity Cruzer April 22, 2011
13 -1