Comes from the Ukrainian term “Busik” it’s a slang term for a bus or a minibus type of vehicle. The term existed for a long time and it seems “Busik” is a vehicle of choice of the tcc. Hence the recently coined term “bussifikatsia” or bussification. The process of forceful conscription of a person by the means of shoving them in a minibus and driving away in an unknown direction (some would have you believe - directly to the front lines).