Definition 1 of 1
Typically used in an accusatory or aggrieved way suggesting that the referred to activity, event or noun is false, misleading, cunning, thieving or generally speaking disingenuous.
Often used as a smokescreen to deflect criticism when caught red-handed.
Derived from the Kannada phrase "sum-sumne" meaning, er, simp-simply
one of a giant class of South Indian English phrases that make no sense in English and have to be translated into Kannada, or Tamil to make sense.