a good job/thing...

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good job

An informal expression of praise for having done something well. (It can also be used sarcastically to mean the opposite.) Mary: "Dad, I got an A+ on my midterm exam!" Bill: "Good job, sweetie!" Good job, Frank, now we're going to have to rebuild this entire model from scratch.
See also: good, job

(it’s) a good job/thing (that)...

(spoken) (it’s) lucky: It’s a good job he was here. We couldn’t have moved the piano without him.It’s a good job my luggage was insured.
See also: good, job
References in periodicals archive ?
As often happens, taxpayers take advantage of a good thing and abuses seep into the system.
The reason is obvious: By placing constant pressure on doctors to deny services, HMOs threaten quality of care; ergo, "quality assurance" is a good thing.