who gives a 如题.谁能举个例子具体解释下?

这个属于口语,与其比较激咧.
可以翻译为:谁管你这么多!谁他妈在乎!管他呢!
意思是,就这点小事,老子才不在乎呢.
比如:
A:Hey,looks like the stock market has just plunged.
看,今天股票好像又跌了!
B:Who gives a shit!I'm out of the market these days.
靠,关我屁事,我这两天没做股票.
又比如:
A:The police has put up a sign at the street corner saying that no one could pass.
警察在街角放了个牌子,说不准过马路.
B:Really?Who gives a shit!I'll cross anyway.
是吗?我才不管呢.我照样过那马路.