The act of drinking your own height in tallboys, duct-taping them together as you go, essentially creating a spear. The object of making spears is to eventually fight each other with them in a drunken riot.
Person 1: Hey Man, we're making spears tonight!
Person 2: Badass, mine's gona be the longest
Person 3: Oh ya? well I'm gona be the drunkest!