It is the feeling you get when after something has happened you think of all the things you could have said.

It originates from the french phrase 'L'esprit d'escalier' litterally translated as 'Wit on the stairs' meaning the feeling you get when you fall down the stairs you think of all the witty things you could have said but didn't.
* Ellie sees Max, her crush walk past *
Ellie: "Hey Max"
Max: "Oh hey Ellie, how're you?"
Ellie: "I... I..." *is unable to form words at the sight of Max*
Max: "Well it was nice seeing you..."
* Max walks off *

Ellie: "Damn Stair Wit! I could've at least asked him how he was or something!"
by Intelligable Rambler August 11, 2011
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Getting a blowjob on a stairwell. Often this causes the shakes, especially when done outside your neighbors door. There is a certain covertness to this often when it is said.
Hey, my sexy Russian baby momma want to help me get in shape on the stair master when they pass out?
by Kiss Kiss & Hero December 20, 2015
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When you get in a fight with your friend and try to cover it up
Hey man what happened,you look like somone punched you?!
Oh,it's nothing I just fell down chinese stairs
by Perzephone December 20, 2019
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When one gets super drunk, complains about their leather, and falls down the stairs demolishing an inanimate object.
Did you hear about Bobby last night? He was super drunk, came upstairs complaining about his leather, and the person who stole his couch spot. Next thing we knew he was stair diving downstairs. I feel bad for the shoe rack.
by madj42 January 3, 2011
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Down stairs is your crotch or groin basically your private area.
Henry: Im going down stairs and it feels so good! Melissa: Oh im going down stairs to baby!
by fresh boy! November 26, 2016
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The act of farting whilst walking up a set of stairs with one or a group of people walking behind you. The escape velocity of the fart will ensure that the pocket of noxious gas will remain at around head height therefore producing an instant and rather effective dutch oven affect.
You see the look on their faces? I just got them with a stair biscuit!
by DrGibbo January 29, 2010
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A child who dwells usually under or close to stairs during lunch, and passing periods, who often is and Anime fag, or general creeper. things kids often engage in eating ice cream, wrestling, and various other activities, all under the stairs.
these kids often thing that there are popular or socially acceptable, but the general population of schools hates them due to their weird rituals
Dude, those STAIR DWELLERS are wrestling under there!
by General Truth December 2, 2010
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