substandard, below standard, bad, inferior, poor, poor-quality, low-grade;
appalling, abysmal, atrocious, abject, awful, terrible, dismal, dreadful, execrable, frightful, miserable, wretched, lamentable, deplorable, pitiful, inadequate, insufficient, unsatisfactory, unacceptable;
jerry-built, shoddy, tinny, trashy, rubbishy;
British cheap and nasty;
North American cheapjack
informal lousy, not much cop, not up to much, crummy, bum, diabolical, rotten, sad, tatty, tacky, dire, tenth-rate
British informal ropy, duff, naff, rubbish, pants, a load of pants, grotty
vulgar slang crap, crappy, shitty, chickenshit
rare direful, egregious