fail (someone) on (something)

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fail (someone) on (something)

To give someone a failing grade on a school assignment. You clearly put zero effort into this essay—that's why I failed you on it.
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fail someone on something

to give someone an unsatisfactory grade on an assignment or test. She failed us all on the math assignment. The teacher failed half the class on the assignment.
See also: fail, on
References in periodicals archive ?
Lay of the day (for a place at up to 3) Kheylide 7.20 Haydock A few in this line-up are proven with cut in the ground and over the 6f trip, but Kheylide fails on both counts.