1. speaking rapidly and incoherently, especially due to fear, shock, or madness

1. present participle of gibber: to speak rapidly and incoherently

Examples

• The frightened witness was found gibbering in the corner.
• After the accident, he was gibbering nonsense about monsters.
• The patient lay gibbering incoherently in his hospital bed.
• She was gibbering with terror after seeing the ghost.
• The old man sat gibbering to himself on the park bench.
• The fever left him gibbering and delirious.
• They found the survivor gibbering about strange lights in the sky.