Journeyed there and back again
I read that in the Sagas his nickname Lothbrock, “Hairy-Breeches”, referred to his exploits in slaying a giant draco. I never understood the connection though…
Ragnar, being a crafty fellow, knew that fighting a lindworm is dangerous work, because their blood is like acid, burning anything it touches. So he made two precautions. He made himself a suit of fur, not tanning the leather but keeping all the hairs on the fur; he rolled the suit in tar and afterwards in sand, letting the tar act as glue to keep the sand in place. He then removed the nail that kept the spearhead attached to the shaft.
Going into battle, he plunged his spear into the worm. As he pulled backwards, the spearhead remained lodged in the wound. However, as the worm writhed around in its death throes, the spearhead was pushed out and a spray of blood hit Ragnar. But, his sand-tar-fur suit kept him safe and prevented the blood from burning him, and he left the site of the battle.
Next day, they found the dragon dead. Wondering who had slain it, they found the spearhead and searched for the man with the spear shaft to match. Ragnar showed up, and for good measure, pulled out the nail from his pocket as well. He got the girl and the gold, though in true Norse fashion, they didn't give him a nickname for slaying a dragon, nope; wearing hairy pants, that reputation sticks to you for life.