i''m 24 years old, close to the place i work at, there is a guy who always insults me for no reason. i want to just slap him in the face.

While someone insulting you is difficult to take, slapping him in the face is deemed a battery on the civil level and assault on the criminal end, so yes, you could be arrested and jailed for that behavior. If this person is in your workplace, there are avenues you can take with your employer to have that individual stop. If they are not part of your workplace environment, but just nearby, you can take other avenues if you feel threatened, such as an anti-stalking order, if you feel they are threatening your safety. You may find more information on this at http://courts.oregon.gov/Marion/MaterialsAndResources/StalkingOrders.page? This response is general in nature and is not legal advice.  No attorney client relationship is formed by it.  Further, the response does not represent the opinions or views of LexisNexis or its affiliated companies.