Green’s Dictionary of Slang

power tool n.

[SE power, supreme, outstanding + tool n.1 (1b)]

1. (US campus) a very annoying person.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Power tool (noun) A person who is more of a tool than most tools. A very inconsiderate or dislikable person.

2. see tool n.1 (2g)