blista effect

The effect when something looks really modest and is cheap or widespread, but in reality performs better than mor eexpensive counterparts. Coined after the famous Blista Compact car in GTA game series, that became widely known in the gaming community for looking really cheap and appearing everywhere on the map, but turning out to be one of the best car in-game, with incredible handling and speed-to-acceleration ratio.
It's also true with people who look shy but turn out awesome when you get a chance to know them better.

-I had a blista effect visiting these cheap Decathlon stores - the things perform much better than you would expect from something that cheep and looking so... cheap.

-Anna felt a blista effect after talking to Josh - he looked homely, but turned out to be an awesome guy.

Hussar gap

Going less than 20km\h over the speed limit, which is forbidden and not fined in Russia at the same time, serving only as aggravation in case you have an accident. Named after hussars, who were a branch of imperial cavalry in Russian Empire. Most of the cars you see on road will be driving at speeds 10-15 km\h higher than the signs allow, thanks to the existence of hussar gap.

You can't get fined going 78 in a 60 zone in Russia, because technically you're goin in a hussar gap. So, on a 110 highway you can speed up to 128, even under cameras. But if you go 131, bam, fine in your mail the next week.