The term "bolloxing up" is a colloquialism used to describe messing something up or making a mistake. The spelling of "bolloxing" can be a bit confusing as it is pronounced differently than it looks. According to the IPA phonetic transcription, it is pronounced /ˈbɒlək.sɪŋ/, with the first syllable "bol" sounding like "bowl" and the second syllable "lox" sounding like "locks." The "-ing" at the end is pronounced like the "-ing" in words such as "running" or "singing."