1. Someone who is constantly coming up with excuses for why he can never make it to anything he has planned to do.
2. Someone who emits a feeling of uneasiness and is hard to fully trust, either due to past experience, reputation, or just plain being sketchy.
1. Man, that Daniele guy is always telling me about how he has to spend time family bonding or how he has to do something else right before he's supposed to show up somewhere, he's such a sketchy bastard!
2. Garret is always making me uneasy, he just has that reputation of never following through with anything, guess he's just a sketchy bastard.