A highly productive but lethargic person. Someone ironically capable of quickly completing work even though s/he generally dislikes doing them in the first place.
"Sean's been complaining about this job for years. I barely see him work and yet he still gets paid in full!? Why haven't we fired him yet?"
"He's an argophile; he never missed a deadline, he hasn't hurt the company, and that works for me."
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.