A Baysplainer can be characterized as someone who didn’t grow up in the Bay Area (probably not even California), most likely works in tech, eats at “hole
in the wall” restaurants (I.e. restaurants that used to actually be a hole
in the wall, but was taken over by a new Asian/fusion spot), considers themselves a “foodie”, most likely lives in the City or Oakland, goes to
Outside Lands, wears their work badge to the bars, and so on.
A Baysplainer tends try to explain to a local “the best parts of the Bay”, the local community, etc., and doesn’t realize the impact they may have had on the local community by moving here and thus, affecting the job market, housing market, influencing the quick rise of gentrification, etc.