"Data Hacker" means any developer, data scientist, data architect, entrepreneur, engineer, or data nerd who is interested in discovering - meeting people interested in - and joining hackathons focused on - new open-source data-centric programming languages and technologies such as Hadoop, Hbase, Hive, Pig, Drill, Mahoot, Lucene, MongoDB, Graph Databases like Neo4J.... pretty much any developer-centric data technology.
Data Hackers is a meetup group run by Data 2.0 (data2x.com) that hosts meetups, hackathons, and workshops for SF bay area data hackers. A lot of our hackathons and meetups are in conjunction with our conferences such as DataWeek 2013 (dataweek.co) and DeveloperWeek 2014 (developerweek.com)
Contact us (the organizers) if you're working on a new data-centric developer tool and you want to partner on a Drinkup around SF! (especially if you want to launch something)