Flimflam and Fast one

Flimflam noun - A clever often underhanded means to achieve an end.

Fast one and flimflam are semantically related In some cases you can use "Fast one" instead a noun "Flimflam".

Fast one noun - A cunning or deceitful action or device.

Flimflam and fast one are semantically related in trick topic. Sometimes you can use "Flimflam" instead a noun phrase "Fast one", if it concerns topics such as cheat, swindle, misleading, hoax.