fishy
"Fishy" is an adjective with two main senses. One is very literal — relating to fish — and the other is figurative and very commonly used in everyday conversation to describe something that feels wrong or suspicious.
When a situation, story, or person's behavior seems strange and makes you think something dishonest or wrong is happening, you say it is 'fishy'. Think of it as your gut feeling telling you: 'Something is not right here.' This is the most common way people use the word in daily conversation.
everyday language · Modern, widely used · figurative