Of dubious nature; having questionable worth or character.
I don't think he should drive. His car is too sketchy.
by Adam Grether February 29, 2008
Something that doesn't seem right, or you're unsure of, or that is just kind of not in your comfort zone.
I'd go, but it's kind of sketchy.
by hannah13 October 02, 2007
a feeling of total nervousness or discomfort, while taking part in a risky situation.
"Sean Randall got sketchy on us when we were getting drunk"
by j kobes July 08, 2006
A riff on the archaic definition of sketch:

1. A hasty or undetailed drawing or painting often made as a preliminary study.

An outline, where not all of the elements are completely clear or known; can refer to a person, place, object or experience; frequently refers to a shady element, something hidden and potentially dangerous; often refers to being up too long on speed and the loss of clarity that comes with sleep deprivation
Are you sure you want to give your car keys to Patrick, he seems a little sketchy.

Gurl, I was fine on day three, but day four was a little sketchy.

Angel is full-on sketchy; she would steal the teeth out of your grandmother’s mouth if she thought she wouldn’t get caught.
by Pop Tart January 12, 2005
when a person is kind of shady, they are sketchy. when you are not sure what a person means by something, that is sketchy too.
It was sketchy when bobby lobby showed up in random places all over the ship, giving people the impression that he was stalking them. gabriela also showed a lot of sketchyness when she said that her skirt made her feel loose.
by gabriela August 01, 2004
Adj- Shady; what the situation becomes when someone has taken too much speed Speed; unsafe; unreliable; not trustworthy

Noun-Sketchball- A person who has taken too much Extacy who cannot make safe decisions and is no longer reliable or trustworthy; A shady character
New York alleys at night are so sketchy.

There is no way in hell I'm going to give my new Mercades to that sketchball.

The wooden rollercoaster at the theme park in Colorado was really sketchy.
by lastchance1291 March 25, 2006
Lacking integrity

Jesse May
Our manager is sketchy at best. He doesn't care about the rules as long as his work gets completed.
by JamesCarlisle July 04, 2015

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