Fancy name for a fancy style of beer. The style is a blending of 2+ lambics of different vintages. In this case Rivertown blended a 1-year old lambic with a 3-year old lambic, which is slightly curious because Rivertown’s barely been open for 3 years. So this 3-year old lambic must be from their first batch or something like that, kinda cool. Something else before moving onto the beer is that Rivertown is spelling it geuze whereas everyone else spells it gueuze. Hopefully one of the guys from Rivertown will drop a comment about why they choose to spell it that way or if it’s just a typo on the packaging.