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1.
to swear on the grave of one's mother
Put it on sumthin man.

On errthang
On my momma, cuz!
by Jim Rawlings December 06, 2006
 
2.
Something you swear on your momma's grave. Term that people from chicago use.
Man, Joe, I swear on my momma that nigga was fake
by sexystud04 May 24, 2009