Phlegma puts Astrid's hair in pigtails for the Midsummer Thing, tying them off with pretty red ribbons. Astrid preens until Snotlout rings her head like a bell and the twins make it the rope for tug of war. By the time she chases down skinny Hiccup to recover the ribbon he snitched, she's had it. She hides behind the sheep shed to unravel the braids and pull her hair into a ponytail, then spends the rest of the Thing biting any hand that touches her.
Which is why Berk's Midsummer peace thereafter names teeth among the weapons under its ban.
Author's Note: A kenning is a Norse poetic trope, a circumlocutory compound that describes a person, place or thing. They can be straightforward (like "ring-giver" for "king") or complex, even riddling. All of these kennings for "woman" come from Old Norse poetry. "Young pine of ribbons" occurs in the life of St. Catherine, Kátrínardrápa, by Kálfr Hallsson. Women are frequently compared to trees in Norse and Icelandic poetry. A "Thing" is a regular assembly of free men at which laws were made and lawsuits settled; it also had religious, commercial and just plain celebratory aspects around the edges.