Sketchy

An adjective that can describe a time, place, person, or thing that seems insufficient, or kinda iffy. A sketchy place would be a place you wouldn't be surprised if you found a dead body or a drug deal. A sketchy thing would be something that could kill you or harm you such as coming in to land an airplane too early or late. Something that isn't very reassuring.

I was driving and then I made a sketchy turn and found myself in the wrong neighborhood.

That dude was so sketchy, I wouldn't be surprised to find him shooting up drugs.

Dude, I was in the sketchiest neighborhood yesterday! The teens there were acting like they were going to rob me!