"Due diligence". It used both as a tag for posts that try to give real analysis, as well as a meme to describe terrible or humorous logic for making trades (e.g

"Due diligence". It used both as a tag for posts that try to give real analysis, as well as a meme to describe terrible or humorous logic for making trades (e.g. "DPZ DD: everyone at this party just agreed that Dominoes Pizza is the best pizza, go long DPZ", stupid stuff like that).