It's possible you're thinking of a different idiom or phrase, or perhaps you've misheard something. Could you provide more context or clarify what you meant?
For example, are you thinking of:
* "There's always a bigger fish": This idiom means there's always someone better or more successful than you, no matter how good you are.
* "He's a real catch": This idiom means someone is very attractive and desirable, often used to describe a romantic partner.
* "Fishing for compliments": This means someone is trying to get praise by subtly hinting at their achievements or qualities.
Please provide more information so I can understand what you're looking for!