【蹭网】
1.hack into one's WI-FI
hack非法入侵；黑客；hack into 侵入（电脑）
hack a WI-FI password破解 WI-FI密码
Do you know how to hack into that shop's WI-FI？你知道如何破解那家店铺的WI-FI吗？
2.use one's WIFI已经告知对方
I would like to use your WI-FI?我想蹭你的网。
3.piggyback/ˈpɪɡ.i.bæk/
做名词表示“背驮” give sb a piggyback背某人；
做动词表示“借用；利用”piggyback on/off/onto sth侵占、利用
英文释义：to use something that already exists or has already been done successfully to do something else quickly or effectively:
piggyback on one's WIFI（在被人不知情的情况下）
The mobile phone company managed to break into European markets by piggybacking off existing networks.
【蹭网的人】
WI-FI squatter/ˈskwɑː.t̬ɚ/ 蹲网的人
WI-FI freeloader/ˈfriːˌloʊ.dɚ/白嫖网络的人
The connection is weak and I'm going to change the password so that WI-FI squatters can't use it anymore.
【热点】
turn on one's WIFI hotspot打开热点
How's the WI-FI here?
--It's unstable and I have to turn on my WI-FI hotspot for my computer.
关于蹭网的这些表达，你学会了吗？我也有发过一篇【网络很卡啊啊】的英文笔记，不记得的小伙伴可以再翻看复习一遍！
