Arriere pensee: (n) a doubt that prevents you from accepting something fully
In a sentence:
Guest: I am not paying for my dinner, it was colder than a polar bear’s posterior, it tasted like burnt hair and it looked like someone had just scooped into my bowl – I hated it.
Waiter: Unfortunately sir, I have a few arriere pensees.
Guest: Well I hope you washed your hands before you served us.
Waiter: No sir, you don’t understand. My first doubt about your claim is that surely you knew ice cream was meant to be cold. Secondly, the ice cream scoop is the traditional method of serving ice cream. Thirdly, the only reason you could taste burnt hair was because your moustache caught on fire while you were smoking a cigarette. Finally, you ordered a second helping of the ice cream and wolfed it down.
Guest: Well played sir, well played. I hope your arriere pensees clear up, perhaps get some cream.