If you buy a picture book of that poem, the illustrations are usually of the full-size, jolly, red and white Santa Claus.
I saw Mitt Romney kissing Santa Claus, underneath the mistletoe last night.
In Michigan, the Charles W. Howard Santa Claus School has been certifying Santa Claus imitators for the past 77 years.
But, as many people know, the modern Santa Claus evolved out of St. Nicholas.
People are not going to vote against Santa Claus ... [Obama voters] got more stuff than other people.
They had sided with Maudie and the others in their faith in Santa Claus.
"Santa Claus bring Margie a balloon from Daddy," she announced.
Can it be Santa Claus himself come to see if it is all right?'
Now Santa Claus spied Polychrome, and trotted over to where she stood.
He carried her little lunch basket and whistled merrily when not engaged in telling her about Santa Claus.
1773 (as St. A Claus, in "New York Gazette"), American English, from dialectal Dutch Sante Klaas, from Middle Dutch Sinter Niklaas "Saint Nicholas," bishop of Asia Minor who became a patron saint for children. Now a worldwide phenomenon (e.g. Japanese santakurosu).