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While doing a sit-up when you bring your body up, the pressure on your stomach causes you to release a fart with a very unpleasant steamy surprise.
Dakota had a PT test early that morning, while doing his sit-ups he had the sudden urge to fart but sadly ended up doing a shartup instead...needless to say he had a shitty morning.
Shartup by Josh and Jen Wildman February 7, 2012

M. Night Shatupon 

Another term for a bad movie made by M. Night Shamylan, specifically one that he shat upon.
Guy 1: Have you seen the movie The Last Airbender
Guy 2: No, but I hear it was a great television series but it was M. Night Shatupon in the movie version.
M. Night Shatupon by JRD_02 May 2, 2014
The liquid in a shart that stains your underwear. A combination of shart and juice - pronounced similar to chartruese
That shart almost leaked through my underwear because there was so much shartuice.
shartuice by Rex Roddy March 9, 2010

Startup Girlfriend 

A girlfriend of a start-up CEO or co-founder who understands that her boyfriend is a young, crazy, ambitious, aggressive, academically and socially intelligent monster whose sole purpose in life is to create innovative technologies and business models. Therefore, he does not necessarily care about anything that goes on outside of his company or the industry in which it operates.

She also understands that for a period of time, her boyfriend is cash-strapped, and therefore does not engage in spurious expenditures and demands such as bottles of liquor at Hollywood nightclubs, sushi at overtly expensive posh restaurants, and $22 sandwiches at Urth Caffe.

The ultimate startup girlfriend also comprehends that time and not cash is the most important asset.
Dude, Sharon is a total-startup girlfriend. I showed up 2 hours late to her birthday party and even forgot her gift at my apartment, but she wasn't upset at all when I showed up!
Startup Girlfriend by SanguineBio September 26, 2010
A recently formed company. In modern terminology, it has come to describe a company formed with a business model relying on the internet.
Johnny Asshat: "I live in San Francisco, I think I'm going to wake up tomorrow and create a startup selling downloadable toast over the internet. It'll be free, but you'll have to pay for the jam which is where I'll make my money. Aren't I quirky and special?"

Me: "No, you're a self-absorbed idiot. Get a real job."
startup by Alexander Vasarab April 17, 2007
is when you have a great tech business idea and you make it a real business, but usually you fail (it's okay), because you're not that f*cking good businessman, or because it turned out that you had a shitty idea and you hadn't pivotted in due time, and you already spent all money.
Good startups (10%): Google, Facebook, Instagram, Dropbox, Evernote, WhatsApp, Snapchat and every other that you using on daily basis.
Bad startups (90%): There are too many to list them, and it will be better to not say them aloud (superstition)
Startup by RandomStartupGuy November 23, 2013