all wet
US /ɔl wɛt/
UK /ɔl wɛt/

1.
大錯特錯, 完全錯誤
completely wrong or mistaken about something
:
•
If you think I'm going to agree with that plan, you're all wet.
如果你認為我會同意那個計劃,那你就大錯特錯了。
•
His predictions about the election turned out to be all wet.
他對選舉的預測結果是大錯特錯。