sketchy

Roughly or hastily laid out; intended for later refinement.

The first draft included a sketchy design.

Not thorough or detailed.

This is still in the design stage, so details are sketchy.

Bellos and Montagu offer a few sketchy alternatives, such as shorter post mortem protections or a curb on corporate rights capture, and call for a “broad debate” on copyright's future.

Resembling a comedy sketch, of sketch quality.

Of questionable or doubtful quality.

The sketchy repair job did not look like it would hold.

Suspected of taking part in illicit or dishonorable dealings.

Because he is so sketchy, I always think that he is up to something.

The downside of working with sketchy dudes on building sites and in greasy spoons was that they were sketchy, but they also knew shady things.