fly-by-night

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fly-by-night

Irresponsible (as if one is apt to flee unexpectedly). He struck me as a fly-by-night worker, so I was shocked when he came back the next day to finish the job.

fly-by-night

Fig. irresponsible; untrustworthy. (Alludes to a person who sneaks away secretly in the night.) The carpenter we hired was a fly-by-night worker who did a very bad job. You shouldn't deal with a fly-by-night merchant.

fly-by-night

mod. undependable; dishonest. Sam seems like such a fly-by-night character.