look up any word, like hipster:
 
1.
Comes from Hebrew.Comes either as a truth tester,truth indicator,or a convincing method.
originally Said: "Be(in) Ima(mother) Scha(yours)".the source of this phrase is in the sentence "I Swear in my mother" or "Do you swear in your mother?"

as an indicator:
"I didnt Break the Vase! in my mother!"
as a tester:
Joe:Who ate my Cookie?
Jeff:It Wasnt me!
Joe:In your mother?
as a convincing method:
Gimme a Shekel! in your Mother!
by Nadav Nuni August 31, 2007