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1.
to attempt to scare another individual with a gun or knife
Break yo self sucka!!
by Essence August 21, 2003
 
2.
What you say to someone before you jack them.
If anyone ever tells you to "break yo self" prepare for a severe ass whoopin'.
In some movie the thug says "break yo self foo" beats the shit out of the guy and robs him.
by Eeepers October 31, 2007
 
3.
What people think gangsters and thugs say before a robbery. Correct term is, "brace yo'self".
Officer! He came up to me and said, "break yo'self fool!" and then he pulled out a gun. Officer speaking corrects victim by saying, you mean " brace yo'self fool!
by Saga121 June 12, 2010