no-good

adjective

1. lacking worth or merit; useless; bad: This no-good faucet never did work properly. Her no-good brother sold me the car.

noun

2. a person or thing that is worthless or undependable.

adj.1908, from phrase no good “good for nothing.” As a noun, first recorded 1924; variant no-goodnik (see -nik) first attested 1960.