MEANING: noun:
1. An expert.
2. A bungler.

ETYMOLOGY: From dab (an expert) + -ster (denoting a person engaged in some activity; originally a feminine suffix, also used as a diminutive and derogatory suffix). Earliest documented use: 1708.
Note: The first sense is more popular in the UK, while the second in the US.

ABSTER - sit-ups champion

DbSTER - Dolby employee

DABITER - mosquito responsible for spreading disease in New York City