We’ve written before at HuffPost UK about what everything from Twix to HobNob and HARIBO really stands for.

We’ve even shared the hidden detail in Twix’s clever branding.

So what about Pepsi, the iconic red, white, and blue-branded soft drink?

Is its moniker some mixture of real, human names (like HARIBO), or a clever portmanteau (like LEGO)?

Is it an acronym or a clever reference (like how the name Marmite sneakily refers to its former cooking and distribution method)?

No, no, no, and no, it seems.

The brand is actually named after indigestion.

What?

I’m as surprised as you are. But then again, I also didn’t know the beverage was originally called “Brad’s Drink.”

Its inventor, Caleb D. Bradham, changed the name in........

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