Okay kiddo, let's talk about butylka in Transnistria.
Butylka is a Russian slang term for a makeshift roadside checkpoint. It's basically a barrier made out of whatever materials are available like sandbags, tires, and barbed wire. These checkpoints are usually manned by soldiers or armed civilians and are used to monitor and control the flow of people and goods in and out of a certain area.
In Transnistria, which is a breakaway territory of Moldova, there are a lot of butylkas because the region is not recognized as a separate country by most of the international community. This means that there are a lot of border disputes and tension between Transnistria and Moldova, as well as with Ukraine which also borders the region. The butylkas are used to control the movement of people and goods across these disputed borders.
Basically, imagine you have a fort made out of sandbags and a bunch of your friends are guarding it. You only let people in who you trust and who you know won't cause any trouble. That's what a butylka is like, but on a larger scale and with guns instead of water balloons.