bollix

American  

[bol-iks] / ˈbɒl ɪks /

Or bolix,

verb (used with object)

Informal.

1. to do (something) badly; bungle (often followed byup ).

   His interference bollixed up the whole deal.

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noun

1. a confused bungle.

Etymology

Origin of bollix

First recorded in 1930–35; variant of ballocks