Green’s Dictionary of Slang

tricked, hoaxed, fooled.

1960		E. De Roo Big Rumble 116: Had the bartender conned. He was ready to fork over when some goddam fool mopping the floor started swingin’ the mop at me.
1972		P. Fordham Inside the Und. 110: The conned businessman will [...] do anything he can to cover up.
2009		P. Temple Truth 297: Oh Jesus. Conned. Conned, stiffed. Boned, rolled.