1: An unfortunate clip of the testicles, usually at a tangent - which sometimes feels more painful than a full impact.
2: Something that is really funny
1: When I caught my nads on the corner of the desk it was a real creaser.
2: The receptionist wet herself when you sent that funny email - it was a real creaser.
A Creaser is generally a very fat person who devotes their life to their computer. Creasers dedicate their lives to MMORPGs and have nothing better to do than argue.
Snipe:I heard Creasers typically have salty balls.
ME: Ya, this has been proven by Awer's mom.
Snipe:LOL, Creaser really fails at everything
ME: Ya basically, they spend their lives buying accounts and failing.