v.15. “Mine adversity”: when David was in trouble, they reversed their way and gathered to oppose and deride him. They were revilers and slanderers, but he didn’t know what they accused him of. They attacked his character and kept at it. v.16. “Mockers”: he is exposed to the jesting of low-class people who make sport of ridiculing. Gnashing of teeth is an expression of derision and scorn.
Psalm 35:15–16