A hairstyle made
popular in Saginaw, Michigan, in which a
woman's hair is pulled up into a full or half ponytail and then pushed forward and sprayed, resulting in a bump of hair on the
top of her head that makes her skull look convex.
Kyle: Did you have a nice time in
mid-Michigan?
Kristi: How did you know I was there?
Kyle: Honey, the Saginaw Speedbump gives it all away.