a sponger on others 靠别人生活的人
social sponger 社交寄生虫
stop being a sponger 别再当寄生虫了
A: Why is he always staying at your house for free?
A：为什么他总是在你家免费住？
B: He's a real sponger, but I can't bring myself to kick him out.
B：他真是个寄生虫，但我实在不忍心把他赶出去。
1) 寄生虫
2) 啃老族
3) 贪小便宜的人
1. 寄生者；依靠他人生活的人
noun
1. A person who habitually lives at the expense of others.
Synonym: freeloader, moocher, parasite