No, Brits aren't googling 'What is the EU?' because they don't know what EU is
geektime.com
geektime.com
The media bias/slander for "What is the EU?" trending speaks more to me about the current state of mainstream media and it's blatant biases than it does the "stupidity of Leave voters" that the media and even a good portion of people is trying to push.
This is very plausible. Look at the terrible UK newspaper coverage of the EU (so poor that the EU needed a mythbusting page[1]).
Ask a few British people if they know what bits of the EU do what.
Add to that the misinformation coming from political parties over the past few decades, and especially from the Leave / Remain campaigns over the past couple of weeks. There are people who voted who honestly think that it would reduce the number of migrants (It won't).
[1] https://blogs.ec.europa.eu/ECintheUK/category/euromyths/
And I just want to find out if my wife can force the retailer of her headphones to fix them under the Product Warranty directive...