How to say: "screwed it up"
&quot;Screw up&quot; is a slang for &quot;to blunder&quot;
搞砸 /gǎo zá/ : blunder
弄糟 /nòng zāo/ : blunder ; mess up

How can I express that someone &quot;screwed [something] up?&quot;

他把事情搞砸了
他把事情弄糟了

砸
: break; smash; shatter
: [slang] fail; fall through; flop