drop a bollock(redirected from drop a bollack)
drop a bollock
vulgar slang To mess something up; to make a particularly egregious error. Primarily heard in UK. That new intern is totally useless, he's always dropping a bollock on important projects. That player really dropped a bollock during the match yesterday.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.