The long sit is an expression used for people who play videos games very often ( 5-8 hours a day) while sitting in a chair. Coming from the original expression " in it for the long run or long haul". These kind of people usually do not work and have no other aspirations than to play video games.
Bryce has played on steam for 100 hours this week he's in it for the long sit.

Tom has over 2 thousand hours played online this year hes in it for the long sit.

Chases ass is molded into his chair hes in it for the long sit.
by jo pig February 10, 2017
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Short for situation-report. That is, explaining the situation in regards to any particular matter.
What is the sit-rep with that chick?
by Rob112 March 10, 2008
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Leisure activity unique to University of Mary Washington students where one or more students observe the activities and/or listen to the conversations of others while sitting on a campus walk bench. It is common for those participating in bench sitting to point and laugh at those whom they are observing. Bench sitting can also be used to observe UMW squirrels.

Not to be confused with "sitting on a bench."
"Two UMW students were bench sitting and watched as a girl nearly walked into a trash can. They pointed and laughed at her."
by Dontknowwhatmynameis April 14, 2008
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The uncomfortable circumstance associated with an unavoidable delay in bowel evacuation.
By the time I reached my stop, I had to shit so bad that I almost didn't make it off the bus. It felt like I was sitting on a stick.
by YAWA May 12, 2015
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a nicer way term for someone's ass/behind
mother: Evan, please get your sit-upon off the floor, I can't pass with the laundry basket; you're in the middle of the bloody hallway.

Evan: go back to your cave. Can't you see I'm playing transformers?.
by sexydimma May 17, 2012
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Friend one: “I’m so hot. I could fuck any girl in this bar.
Friend two: “The fuck, Sit down. You ugly as hell.
by Mat2006th October 10, 2019
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