muddle through
phrasal verb with muddle verb uk/ˈmʌd.əl/ us/ˈmʌd.əl/
胡乱应付过去
to manage to do something although you are not organized and do not know how to do it
Sorry, but I can't help you - you'll just have to muddle through on your own. 恐怕我帮不了你——你得自己设法应付了。