Fart, coward, flatulence. Derived from the verb бздеть (to fart quietly; to be afraid), which has ancient Proto-Indo-European roots. In vernacular Russian, it is used as a noun both to describe a silent, smelly fart or, metaphorically and very commonly, to insult someone who is easily scared or cowardly.
Еще через минуту мне уже было наплевать, услышит ли моя партнерша мой бздюх, или нет — в общем, я со всей силы вытолкнул зловонные газы из своей жопы.
After another minute, I didn’t care whether my partner heard my fart or not — in short, I let the stinking gases rip out of my arsehole with all full power.
(Трахопуков П.П. @ pisyun.ru, 02/2011)
