What is "porchcrawler"

A porchcrawler or porchclimb is a mixed drink made primarily of beer, vodka, gin, and a sweetening agent (for instance, lemonade concentrate). Sometimes rum or whiskey are included as well. The final product is generally a highly-alcoholic, carbonated punch with a fruity taste and a light pink or yellow color. It is typically served from a large cooler of ice and is especially popular with North American college students.