do a good, bad, etc. job
do a bad job
To perform a task poorly. I sure did a bad job of parking the car—I doubt I could get any further away from the curb. Please paint carefully. If you do a bad job, you'll be stuck with it.
do a good job
To perform a task well. I must have done a good job on my research paper because I got an A+! Please go clean your room. If you do a good job, you can stay up extra late tonight.
do a good, bad, etc. ˈjob (on something),
make a good, bad, etc. job of somethingdo something well, badly, etc: They did a very professional job. ♢ You’ve certainly made an excellent job of the kitchen (= for example, painting it).
See also: job