Lord of the Pub Crawl

Due to your extensive "research" into distilled substances, you have Advantage on all CON saves when ingesting poisons (including, but not limited to, alcohol, at DM discretion). This does not by any means indicate that you have resistance to poison damage.

In order to acquire this feat, you must spend a minimum of 5 down time hours per day for a minimum of 20 days in a 30 day period ingesting the substances which you intend to build a tolerance to.