Took a duffy 

To take a play off, fail to perform given responsibilities especially in position-based team sports but extending to responsibilities given in a greater team setting.

The linebacker took a duffy on that last play, allowing the offense to score.

Janet took a fucking duffy this morning and failed to bring in the donuts, depriving the marketing team of a shared diabetic experience.

Took a duffy by Ned's Little Brother June 29, 2019