Meaning of “cropper” - Learner’s Dictionary

cropper

noun uk us /ˈkrɒpər/
come a cropper

to fall over:

The horse came a cropper at the first fence.

to fail in an embarrassing way, or to make an embarrassing mistake:

He came a cropper because he'd forgotten to bring the notes for his speech.

(Definition of “cropper” from the Cambridge Learner’s Dictionary © Cambridge University Press)