1. good job - Noun
2. good job - Interjection
good job
(idiomatic) well done; congratulations!
If you hadn't hit that last ball, we would have lost. Good job!
Used other than figuratively or idiomatically: see good, job.
(idiomatic, Britain) a good thing.
It's a good job that he was there to catch the vase when I dropped it.
Good job Sarah isn't scared of spiders: I don't think I could cope without someone to remove them.
PMB, Good job, Thank you. Source: Internet
Good job, Brian, try reading the paper sometime. Source: Internet