a person who pulls sketchy moves while drunk, including but not limited to stealing things from bars, flirting with a hottie while your significant other is at the other end of the bar, or periodically disappearing to the bathroom to make out.
"Jorge was a total sketchoholic last night- did you notice how he kept disappearing with that girl?!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.