1.) The quality of being half-assed; the resultant perception of an individual--or group of individuals--being slothful, ignorant or apathetic.
2.) The essence of a result or solution that has been completed to a less than acceptable level of quality. Mediocrity.
Thanks to the halfassidness of the staff at Best Buy, I decided to buy my new TV elsewhere.
After the case cracked twice on her vibrator, it was apparent that the quality control department at Electra-Schlong, Inc. was fraught with halfassidness.