1) Teutonic people who invaded the Roman Empire. The threat ended in the 5th Century.
2) A set of intellectual and sartorial conventions adopted in order to publicly affirm the wearer's disdain for conventions or public displays. The threat ends when the goth's allowance is cut off.
1) Goth dialogue, 300AD. Look, Olaf! Chavs! By god, we shall attack them and plunder their booty!
2) Goth dialogue, 2006AD. Look, Tarquin! Chavs! Oh god, I hope they don't attack us and steal our unread Penguin Classics translations of Camus.