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–verb (used with object). The act or instance of hijacking an unprotected WiFi signal from a nearby wireless network without the owner knowing it. Best conducted whilst sitting as inconspicuously as possible near a window to avoid exposure; also because Wi-Fi signals travel better through glass than through solid walls.
1) "Hey John I know you're on the road but I just wanted to see if you got my e-mail."

"Yeah man, I just pulled over in front of some random house and fi-jacked their wireless connection with my iPod to check on it. Looks good."

2) "Hey John how much are you paying for internet access?"

"Actually nothing. My neighbors are dumb enough to leave their wireless network open, so I just Fi-Jack them them all day long."
Fi-jack by Oatmeal raisin the dead February 10, 2010
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That thing when your phones data’s not working and it's because you phone is joined some "Log In" WiFi.
Ahh, that's why it's not bloody working Dave, I've been fi-Jacked.
fi-jacked by Airblocks WiFi Ltd February 20, 2014
Related Words
Fi-jack fi-jacked fijackle fi fi'in Fi Male FI/RE Fi_batty FI Audio fi-chest-a
When a person or persons take-over a Facebook thread with subject matter unrelated to that thread will now be known as FIJACKING, to do this makes you a FIJACKER.
You'll fijacked my thread!
Fijack by Bridge house January 26, 2011

fijackle 

Stop fijackling nemo she's your cousin!
fijackle by anna July 13, 2004