Working Like The Dickens 

Failing to reach job performance standards despite repeated claims to the contrary from one's superior.

Kevin, according to his boss, is working like the dickens day and night. Unfortunately, he's failing miserably at his job.

Working Like The Dickens by Timberwolves Central July 31, 2008

Working like the dickens 

(simile) -- Means working hard on everything BUT your own job.

Kevin has been working like the dickens lately. He has picked up a nasty addiction to cribbage and fishing but continues to suffer with his own job performance.

Working like the dickens by Timberwolves Central April 25, 2006