In Pulp Fiction, the Whopper in France doesn't have a significant role. It might just be mentioned in passing or have a minor connection to a certain scene or character, but it's not a key plot point.
I have no clear idea. It could be a fictional story full of surprises and twists. Or perhaps it's based on a real event that got blown out of proportion.
In Pulp Fiction, they might call a whopper something specific based on the context or the characters' lingo. But without more details, it's hard to say exactly.
I'm not sure specifically which 'Tim Kempton Whopper story' you are referring to. There could be many stories involving someone named Tim Kempton and a Whopper (presumably the Burger King product). It might be a personal anecdote about Tim Kempton's experience with a Whopper, like a memorable meal he had or something funny that happened while he was eating one.
Honestly, I have no clue. It might be a comedy story, making your wife laugh, or a mystery one keeping her on the edge of her seat. We need more info to figure it out.
One possibility is that Tim Kempton had a bet with his friends about how many Whoppers he could eat in a certain time. So the story could be about his attempt to win the bet, whether he succeeded or not and the hilarious moments during the process.