"leech" in Chinese (Simplified)
蚂蟥寄生虫（比喻人）
Definition
水蛭是一种蠕虫状的小动物，附着在其他动物身上吸血。该词也用来比喻经常依赖别人、占便宜的人。
Usage Notes (Chinese (Simplified))
'Leech' 指动物时为中性词，形容人时为贬义且常用于口语。如果说某人是 'leech'，通常带有侮辱意味。常听到：'he's a leech'，'don't be a leech'。
Examples
A leech lives in rivers and lakes.
**蚂蟥**生活在河流和湖泊中。
The doctor used a leech for old-style treatment.
医生用**蚂蟥**进行传统疗法。
He called his friend a leech because he always borrowed money.
他把朋友叫做**寄生虫**，因为他总是借钱。
My cousin is such a leech—he never pays for anything!
我表弟就是个**寄生虫**，从不买单！
After I got my bonus, a bunch of leeches started asking me for favors.
我拿到奖金后，一堆**寄生虫**开始找我帮忙。
I can't stand people who leech off others without giving anything back.
我受不了那些光**依附**别人却什么都不回报的人。