smell a rat
US /smɛl ə ræt/
UK /smɛl ə ræt/

1.
mencium gelagat aneh, mencium bau busuk
to suspect that something is wrong or that someone is trying to trick you
:
•
When he offered to pay for everything, I started to smell a rat.
Ketika dia menawarkan untuk membayar semuanya, saya mulai mencium gelagat aneh.
•
The police smelled a rat when the suspect's story kept changing.
Polisi mencium gelagat aneh ketika cerita tersangka terus berubah.