go down the tubes
US /ɡoʊ daʊn ðə tuːbz/
UK /ɡoʊ daʊn ðə tuːbz/

1.
gagal total, bangkrut, hancur
to fail completely or be ruined
:
•
The company started to go down the tubes after the scandal.
Perusahaan mulai bangkrut setelah skandal itu.
•
If we don't fix this problem, our whole plan will go down the tubes.
Jika kita tidak memperbaiki masalah ini, seluruh rencana kita akan gagal total.