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Literally means Sister fucker in Bengali, but we insist on a noble meaning, rather the other side of the meaning -

If your brother-in-law is your Sala, then you are his Banchot!!
Banchot chhele, ebhabe lagay!! (meyera jakhon bole)

Banchot chhele, ay tor pod mari!! (Chhelera jakhon bole)
by Nitya Dhan Khara December 21, 2006