be a huckleberry over (one's) persimmon

dated To be somewhat or slightly beyond one's abilities or talents. Primarily heard in US. I'd like to help you fellas out, but I'm afraid herding cattle is a huckleberry over my persimmon.

Common Names:

Name	Pronounced	Usage
Ywain	-	Arthurian Romance
Eliphelet	i-LIF-ə-let (English), ee-LIF-ə-let (English)	Biblical
Narelle	-	English (Australian)
Brunhilda	-	History
Domitius	-	Ancient Roman
Eneida	-	Portuguese (Brazilian), Spanish (Latin American)