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
Florence	['flɔ:rəns]
Norbaer	nawr-BER	Limburgish
Hyun-Joo	hyun-joo	Korean
Gena (1)	JEE-nə	English
Jaakkima	YAH:K-kee-mah	Finnish
Vidya	-	Hinduism, Indian, Marathi, Hindi, Kannada, Telugu, Tamil