i Register
In some senses, crappy is marked as vulgar, US, colloquial. Watch for register when choosing this word.
adj
Of very poor quality; unpleasant; distasteful.
That is such a crappy car.
The referee just made a really crappy call.
Bad, sick, or depressed.
I'm feeling really crappy - I think I need some fresh air.
Covered in crap (faeces/feces).
Put the crappy diapers in the brown pail and the wet ones in the yellow pail.