be not worth a crumpet
informal To be useless or worthless. Primarily heard in Australia, New Zealand. This chair is not worth a crumpet. One of the legs just broke clean off! You asked those two to help you with your homework? Please, they're not worth a crumpet. They barely know that one plus one is two. I was so excited when my grandfather said he'd give me his car, but this old clunker isn't worth a crumpet.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.