Among college drinkers, if a person at a party announces a "Social!", it is a command that everyone within earshot take a large drink of alcohol in unison, to consume the drinks quickly and get the crowd as drunk as possible. Seasoned partiers will yell "Social!" in return to help announce and time the act.
"I just turned 20 and I have a big test on Monday -- we are gonna get so fucking fucked up tonight. Social!"
(Crowd screams "Social!" and goes quiet as dozens of people chug their beverages.)
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