By the skin of your teeth Definition 1 of 1Pro Tip 1/3Metaphorical Meaning The phrase is not literal; it emphasizes a very close or narrow escape or success. He avoided the accident by the skin of his teeth. Pro Tip 2/3High Drama Use it to describe situations with high tension or last-minute success. She caught the train by the skin of her teeth. Pro Tip 3/3Not for Precision It's inappropriate in formal or academic contexts where precision is needed. He completed the project by the skin of his teeth.