Хлебен [khlében·Adj. An otherwise juicy fruit that's too dry and unpleasant to eat, making you feel like you're eating bread. Source
Дървен философ (wooden philosopher)·Somebody who's extremely confident in their knowledge, but doesn't have the slightest idea what they're talking about. Source
Пострелям (postrelyam)·To shoot a little bit, presumably out of boredom or because one wants to, until one doesn't feel like shooting anymore. Source