Because that's on my resume

Something you say sarcastically to your boss when they constantly ask you to do work that's not in your job description or some lazy co-workers'responsibility.

Boss: Hey Steve, can you go pick me up a birthday card for my wife?
Steve: Because that's on my resume.

Boss: Hi Mary, Steve screwed up our quarterly stats again. Do me a fave and fix it by tomorrow?
Mary: (sarcastic eye-roll) Yeah because that's on my resume! Glad Steve makes $10G's more than me.