sketchy

Short definition from Wiktionary

Adjective

1. 1
   Roughly or hastily laid out; intended for later refinement.
2. 2
   Not thorough or detailed.
3. 3
   Resembling a comedy sketch, of sketch quality.
4. 4
   Of questionable or doubtful quality.
5. 5
   Suspected of taking part in illicit or dishonorable dealings.
6. 6
   Disturbing or unnerving, often in such a way that others may suspect them of intending physical or sexual harm or harassment.
7. 7
   Disturbing, or indicating possible danger.