Overclocked? Overcooked!

Well, my cousin, or is it nephew, Jeff is a big computer guy. He's always talking about the latest computer gadgetry. Well he decided to "improve" my graphics card by "overclocking" it. Whatever that means? So, last night I tried one of my games and man what a difference! It was like night and day! It really worked well... until the computer locked up and crashed! I guess I'll have to ask Jeff how to unclock my graphics card? Or maybe I'll try it again to see if it crashes again... (Jeff I may be in touch soon)