smelled a rat

Grew deeply suspicious

Smelled a rat means sensed something wrong or suspected deception.

The image is of a cat detecting a hidden rodent—you can't see the problem, but something feels off: I smelled a rat when he asked for my password.

Also *smell a rat* for the unconjugated form.

Related

sixth sense · intuition · cautious · disbelief · fraudulence · skepticism · gut feeling · alarm bells · duplicity · trickery · funny business · wary · deceitfulness · red flag · caught on · called out · uncertain · too good to be true

Opposites
suspicion vs. trust

smelled a rattook at face value

Believed without scrutiny

took on faith · let one's guard down · fell for it

skepticism vs. credulity

smelled a ratfell for it

alertness vs. obliviousness

smelled a ratlet one's guard down

Cease being defensive

Family

smell, smelled, smelling, smells, smelly, smellier, smelliest, smelliness, rats

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Negative · Everyday, not technical · Rated G