A fish can smell fishy (a pescado), especially if it is not fresh. “Fishy” has another use. Examine these:
- There is something fishy about Mr. Pujol.
This means that there is something that is not right, something is irregular or suspicious and does not “add up” (no tiene sentido). Perhaps you might say in Spanish “hay algo en Señor Pujol que resulta sospechoso”.
- An account or explanation about something could be “fishy”. So, Mr. Trump´s explanations to the Senate sound “fishy”, that is, something is puzzling and unexplained, and perhaps it is a “cover up” (algo es ocultado).
- There is something fishy going on in the Spanish government: something negative and irregular is happening. “Hay un gato encerrado” may be similar.
Some people are involved in a “fishy business” and a certain Spanish “Prime Minister” got a degree even though he copied text from another writer: fishy circumstances or a fishy business.