What is the meaning of Lousy?

Unwanted and often unpleasant.

1. Insufficient and less than expected of a good thing.

   Insufficient and less than expected of a good thing.

   Remarkably bad; of poor quality.

   Dirty or untidy.

   Underhanded; mean; contemptible.

   Unwell; under the weather.

   Infested with lice.

   Filled or packed (with something, usually bad).

   Source: wiktionary.org