waster
[ˈwestɚ]
n.
造成浪费的人或东西，挥霍者;
不珍惜时间和金钱的人;
例句:
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Surfing the Internet is fun, but it's also a time waster.
上网很有意思，但也很浪费时间。
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The waster products are dumped into the boxes.
把废品倒进箱子里.
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In America we should call him a pretty fair specimen of a waster.
在美国我们就管他叫典型的浪子.