The original "bunco" was a dishonest gambling game. Can be used to imply deceit and fraud.
In the old days, Sgt. Joe Friday and Officer Gannon on the TV show "Dragnet", working out of the bunko squad, would bust some scam artist for conning some little old ladies.
By Viviene
Bunco
A lamedice game that ladies use as an excuse for abandoning their families and drinking on a weeknight.
I'm sorry, honey, I can't cook or help with the kids' homework tonight; I am needed at the bunco party.
By Reeta
Bunco Squad
The bunco squad is those policemen who investigate confidence swindles. In use from the 40's through the 60's. Not usual among law enforcement today.
The original "bunco" was a dishonest gambling game. Perhaps a variant of banco, from Spanish banca, which is a card game similar to "monte".
Eventually the word evolved to mean swindling or fraud of any sort).
Now applied to various groups of poseurs who appear with their wack front.