Serves as a multiplier of sorts for the adjective "Sketch." Can be used to describe any person or situation that is unpleasantly odd or out of place. Often used specifically to denote a person who may seem untrustworthy, paranoid, or generally displeasing.
"Sitting in a parking lot with your lights off at 2 a.m. is way sketch ball."

"That dealer is a sketch ball to the max."
by Chandler W December 2, 2006
1. One who is "sketch" quite often.
"Hell no, that sketch ball isn't coming to my party!"
by dan March 10, 2005
Apart from all of the noun definitions;

v. to look at (eyeball) somebody in a strange or sketchy way, as if about to call the police.
Don't fucking drive 80 down my street. My neighbor was sketch balling you the whole time.
by mynameisbs July 14, 2010
Dude, see that guy standing there, staring at the cheerleaders? He's such a sketch ball
by Mommmmmy October 13, 2008
A person, place, or event that is of questionable quality and/or reputation
#1
Matt: Are you sure they won't card us at this liquor store?
Me: I dont think so, it seems pretty sketch balls to me.

#2 Matt: This chick really wants to hook up with me tonight.
Me: I dont know man, she seems pretty sketch balls to me.

by da balla 1234 February 9, 2009
1) Freaking out

2)Doing things in a very confused manner possibly while high ( If High very similar to "tripping balls")
1)a: Calm down man, its no big deal that your a little behind in work
b: No man it is a big deal. I am sketching balls right now

2)Dude...Dude, I'm sketching balls right now
by BOy_Wonder89 December 9, 2008