An unattractive person.
On December 10th, 2001, actress/ spokes model Jaime Pressly delighted fans with an appearance on "The Howard Stern Radio Show." Fans were particularly delighted when she accounted for his ugly looks: "You," she told Stern, "look like you got slapped with a yarmulke!"
Describing at an unattractive person: He looks like he was slapped with a yarmulke.