Besides its literal sense (Isaiah 37:29, etc.), is used in the original (saphah) metaphorically for an edge or border, as of a cup (1 Kings 7:26), a garment (Exodus 28:32), a curtain (26:4), the sea (Genesis 22:17), the Jordan (2 Kings 2:13). To "open the lips" is to begin to speak (Job 11:5); to "refrain the lips" is to keep silence (Psalms 40:9; 1 Peter 3:10). The "fruit of the lips" (Hebrews 13:15) is praise, and the "calves of the lips" thank-offerings (Hosea 14:2). To "shoot out the lip" is to manifest scorn and defiance (Psalms 22:7). Many similar forms of expression are found in Scripture.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Lip'". "Easton's Bible Dictionary".