A tool

When I said someone was a "tool" - if you knew the circumstances, you might say it was too kind a term - I was thinking of part of this second definition: "A person, typically male, who says or does things that cause you to give them a 'what-are-you-even-doing-here' look. The tool is usually someone who is unwelcome but no one has the balls to tell them to get lost. The tool is always making comments that are out-of-place, out-of-line or just plain stupid."