"Or maybe a sailor will fight with an officer and get written up for punishment. Then he'll go off and join the jibers. We call them that because it's what you say a boat does when she makes a turn you don't want—she jibes." -- Gene Wolfe, The Urth of the New Sun
The space ship is so vast and ancient that various completely independent cultures have formed, plus sub-cultures, in this case the utterly undergroundy jibers.