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Someone who is doing something wrong and is being obvious or looking guilty.
Somone is dealing crack in front of a cop. "look at that sketch monster!"
by carla and tracy October 26, 2007
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
via giphy
by ecogoth December 30, 2020
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2
some one who does or says sketchy things. overly sketchy, suspicious.
ruby: OMG guess what matt told me last night?
catherine: what?
ruby: he said we should go to the woods at night
catherine: what a sketch monster!
by candycanelegs September 03, 2012
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3
One who is sketchy in monstrous proportions.

One who is very, very suspicious or acts in suspicious ways.
(Random guy hides behind a wall.)
Person 1: Dude, look at that sketchmonster behind that wall.
Person 2: Yeah, seriously. Look at him. Standing behind that wall.
by Pdoany. February 25, 2009
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