noun

• A utensil for dispensing a single drop of liquid at a time.
• One who drops something, especially one who drops a specific item to cause mischief.
• (computing) A software component designed to install malware on a target system.
• (fishing) A fly that drops from the leaden above the bob or end fly.
• (mining) A branch vein which drops off from, or leaves, the main lode.
• A dog which suddenly drops upon the ground when it sights game.
• (Australia) A batten fixed to a post-and-wire fence to keep the wires apart.
• (slang) A person who uses fraudulent cheques.
• (tennis, informal) A drop shot.