above (one's) bend
Exceeding one's knowledge or ability. Lifting that heavy box is definitely above my bend—my arms are too scrawny for that! He's a great handyman but electrical work his above his bend.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
above one's bendand above one's huckleberry
Rur. beyond one's ability. Fixing those new cars with computers in them is above my bend. Joe's a good cook, but fancy desserts are above his huckleberry.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.