shirk (one's) duty
To avoid, neglect, or evade one's duty or responsibility. You're supposed to manage the company's social media presence throughout the day, but we feel like you've been shirking your duties lately. It turns out that he had shirked his duty as the quality assurance inspector, which resulted in several thousand batches being contaminated with E. coli.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
shirk one's duty
to neglect one's job or task. The guard was fired for shirking his duty. You cannot expect to continue shirking your duty without someone noticing.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.