A Japanese expression, meaning literally to "suck my dick".
Chi chi nami nami, bitch!
A friend, relative, or associate, that always has a better story than yours. This person will lie about almost every detail of his story just to be a little bit better than you. Traits are lonely adolescences with absolutely no friends, and a lot of cats.
Me: Dude, I hit a birdie on that last par 5"
One Uper: Well, I just happen to get an eagle on that hole.
Me: I won the lottery this weekend.
One Uper: I've won it twice.
Me: How is that possible, duche?