on shaky ground
US /ɑn ˈʃeɪki ɡraʊnd/
UK /ɑn ˈʃeɪki ɡraʊnd/

1.
불안정한 상태, 위태로운 입장
in an uncertain or unstable position; likely to fail or be challenged
:
•
His argument was on shaky ground because he lacked sufficient evidence.
그의 주장은 충분한 증거가 부족했기 때문에 불안정한 상태였다.
•
After the scandal, the company's reputation was on shaky ground.
스캔들 이후, 회사의 명성은 불안정한 상태였다.