muck something up
phrasal verb with muck verb uk/mʌk/ us/mʌk/
informal
打乱;把…弄糟
to spoil something completely, or do something very badly
I really prepared for the interview because I didn't want to muck it up. 我确实为面试做了准备,因为我不想把它搞砸了。
I mucked up the whole test! 我考试砸锅了!