* It's a regional expression: Some phrases are very specific to certain geographic locations or social groups. Perhaps this is a local saying in a particular region you're familiar with.
* It's a misheard phrase: Sometimes, a phrase is misremembered or misinterpreted over time, leading to a variation of a known phrase.
* It's a made-up phrase: It's possible that you've heard it used in a humorous or ironic context, and it's not a real expression.
If you could provide more context about where you heard this phrase, it might be easier to figure out its origin.