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Disruption of sleep patterns (circadian rhythm) caused by continued computer usage late at night or through interaction with users in different timezones.
I've been on instant messenger with friends in Europe every night this week, and now I'm so netlagged I can't get to sleep before 5 AM.

He had such a severe case of netlag from playing World of Warcraft three nights in a row that he fell asleep in class today.
by Michael Gordon (Zebidee55) October 14, 2008
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2
A feeling like jetlag that happens after you use your computer after sunset and the bright backlight tricks your body into thinking it's still daytime.

(For details, google "photoentrainment".)
I was online until midnight last night, and now I feel like I'm still on Tokyo time. Net lag sucks.
by Tom Cohen November 30, 2009
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3
A feeling like jetlag that happens after you use your computer after sunset and the bright backlight tricks your body into thinking it's still daytime.

(For details, google "photoentrainment".)
I was online until midnight last night, and now I feel like I'm still on Tokyo time. Netlag sucks.
by Tom Cohen November 30, 2009
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4
A temporary disruption of the body's biological clock experienced by persons who stay awake all night chatting on the Internet to someone resident in another time zone (typically a person they have never met and never will). The effects of net lag, which may include fatigue and irritability, generally disappear soon after one's partner discovers the conversation history in the messaging application.
"Damn Taylor, you look like shit today"
"I know, that Swedish chick is giving me a severe case of net lag."
by trickeychick &moblet April 15, 2008
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5
Noun: A Netflix induced state of tiredness similar to jetlag
"hey, Emma why were you late today? "

"sorry I stayed up half the night finishing a series, I've got major Netlag"
by gazbo October 23, 2018
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6
A temporary disruption of the body's biological clock experienced by persons who stay awake all night chatting on the Internet to someone resident in another time zone (typically a person they have never met and never will). The effects of net lag, which may include fatigue and irritability, generally disappear soon after one's partner discovers the conversation history in the messaging application.
"Damn Taylor, you look like shit today."
"I know, that Swedish chick is giving me a severe case of net lag."
by trickeychick & moblet April 14, 2008
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7
The delay experienced as news moves from the internet to newpapers magazines and television. News appears first in the fastest, unintermediated media like blogs and wiki's. All other media are slower, hence the lag. The surprise you feel when you read todays newspaper after surfing the web, and you realize it yesterday's news.
"Hey jimmy, stop reading newspaper or you'll get netlag".
by Rob Tyrie March 19, 2005
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