A shandy is a beer cocktail, of sorts- so it's a sweet and bubbly lemon drink mixed with the beer. This place takes it a step further and uses a lager made with lemons; at least the one I'm thinking of is.

[Not a bad place to start when it comes to a lemon-y beer, after all.

Huh, this was the most he'd spoken to anyone in a while. Weird.]