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someone who does really shady things and who's eyes shift a lot. someone not to be trusted with ANYTHING.
Pamela is soooo sketchy. She's probably stealing someone's clothes right now...
by bharath December 11, 2007
Originated as a skateboarding term, meaning "sloppy landing". Now commonly used as "uncertain, unfriendly, creepy, unsafe".
1. That trick was sketchy. I'm going to re-do it.
2. This neighborhood looks sketchy, let's get out of here.

3. He looks kind of sketchy, I don't think I can trust him.
by skatefussbus June 13, 2013
adj: jailbait accident waiting to happen. And by accident we mean piano-suspended-by-fishing-line style accident.
"Dude, I swear she is 18!" "No man, she seems Sketchy"
by The Lawlrus March 31, 2009
A commonly used word at SMU, often used to refer to a situation or person being "Sketch." The word can be used as "sketch," "sketchily," "sketchmiester," also interchangable with shiesty If you see someone being sketch at a party call them on it. Girls if a guy offers to buy you a drink and he's "sketch" watch him like a hawk bc he may slip a rufie in your drink.
Lee is sketchily touchy dani on her ass.
Lee is so sketch that no one wants to be alone with him.
He is SO sketchy that Robyn locks her door at night.
by Jgo September 08, 2005
when a persons behaviour is not align, but they are not going on a tangent neither they are just there, somewhat paranoid.
when you talk fast, respond before you let the person you're talking to respond. Some symptoms of sketchyness.
by abnormal handpuppet December 20, 2004
A word of which the true meaning is known only by the user. Can be used to describe either a shady event/location/person, or a cool event/location/person. Has also been used to express degrees of confusion.
For example:

Sally: “Jim’s acting sketchy as hell.”

Mary: “What do you mean? That word makes no sense.”
by Tsunami Lu March 19, 2009
the adjective describing someone who is sneaky and manipulative. a liar and cheater with alot of hoes.
aka kyle k. - "Brittany, i swear your the only girl, i promise."
2 minutes later
"Yo aubrey baby, always and forever, were all each other needs at the end of the day baby."
Kyle is being sketchy.
by Your Girls May 29, 2008