If a sandcastle is washed away by the tide there is a chance, however minute that this sandcastle will be washed back perfectly the next day, this describes chaos theory. In the same way a member of the friendship group is squiggly, 99.9% of what they do will either go hilariously wrong or they will break something, but that 0.1% of the time they accidentally creat works of wonder. Based on the local folklore of Squiggles McGee in Somerset.
Basically, the more proper word for motorboating. A tight grasp of a guy's head into a girl's boobs and then shaking violently left to right. Invented in Montreal, Canada.
Ugly girl: I don't understand, Pamela. How do you get so many guys to like you, without even trying?
Pamela: Easy. I just give 'em one of my signature squiggles.