i Register
In some senses, lousy is marked as colloquial. Watch for register when choosing this word.
adj
Remarkably bad; of poor quality.
No offense, but his cooking is lousy.
Dirty or untidy.
I cleaned the lousy garage.
Unwell; under the weather.
I caught a cold and I've been feeling lousy all week.
Underhanded; mean; contemptible.
I've had enough of lousy backstabbing at this place.
Infested with lice.