1. a person who makes careless mistakes or acts clumsily

Examples

• The new employee was such a blunderer that he spilled coffee on important documents twice in one day.
• Don’t let that blunderer handle the delicate equipment.
• She felt like a blunderer after accidentally deleting the entire presentation.
• The coach replaced the blunderer with a more reliable player.
• His reputation as a blunderer made it difficult for him to find work.
• The blunderer knocked over three displays while walking through the store.