Groom
I don't have a sweet tooth; I have a sugar tooth.
Bride
Unique, odd, different, interesting, and bunch of other descriptors with similar meanings have been used for me.
Best Man
Best friend. "Super Dave."
Maid of Honor
Friendishedness.
Groomsman
Silent Assassin.
Bridesmaid
Any day is good day to sing and dance.
Ring Bearer
Little Lightning.
Flower Girl
Beautiful Princess.
Usher
Usher
Born to Entertain.
Mother of the Groom
Is probably going to cry.
Mother of the Bride
Angela's "en-garde" partner.
Father of the Groom
Probably at the shop.
Officiant
Time Efficient Officiant.