From Wiktionary, the free dictionary
From бог (bog, “God”) + -ичко (-ičko, diminutive suffix).
бо́жичко • (bóžičko)
- good Lord
- oh my God (expression converying joy, surprise, worry, etc.)
- “божичко”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “божичко”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010