A narrative of adventures; especially; a tall tale
ETYM Old Eng. yarn, yarn, AS. gearn; akin to Dutch garen, German, Old High Germ., Icel., Swed., and Dan. garn; of uncertain origin. Related to Cord.
1. A kind of string spun from wool, used in knitting and other textiles.
2. A wild or improbably story.
To tell a wild or improbable story.