Sliding on your butt, on a preferably wet and snowy hill, racing your friends to the bottom.
Tyla slid on her butt to the bottom, perfecting the Mariokarting slide.
by BobdaBuilderr November 3, 2009
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A group of male friends, often bisexual, sliding around naked in a communal shower.
Man 1: Man did you hear all the ruckus from the males bathroom last night?
Man 2: Oh yeah, haha, me and the boys were MarioKarting
by APH319 July 18, 2018
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When you're in a hurry to get somewhere so you cut corners and weave through traffic without signaling to get there a bit faster while being a total asshole.

Can also apply to walking - going off of paved walkways, stepping over the grass and through bushes, weaving through people like traffic and not giving a shit if you bump into people's shoulders or step on flowers.
Dude #1: Fuuu, we're going to be late and there's an exam today.

Dude #2: Nah we'll be fine, I'm gunna mariokart this shit. Fasten yo seatbelt.

Example 2 -

Dude #1: Man, your pants are all cut up and shit. Looks like you're bleeding, wtf happened?

Dude #2: I was gunna be late so I had to mariokart through some bushes and tripped.
by Phanick November 23, 2015
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A term to describe how you are feeling. You use it when you feel like all hope is lost and you want to die.
I got fired from my job and now I feel like Mini Ladd playing MarioKart.
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