lawnmower beer
n.— «Now that the heat of summer is upon us it’s the perfect time to enjoy clear refreshing lagers, and, of course, the most popular version, pilsner. “Lawnmower beers” they are sometimes called.» —“Summer time is the right time for ‘lawnmower beers’” by Jim Witmer Dayton Daily News (Ohio) June 15, 2005. (source: Double-Tongued Dictionary)