1. vulgar slang The glans penis; the head of the penis. Primarily heard in US. I'm always afraid of catching my peckerhead in my zipper whenever I go to the bathroom.

2. rude slang An unpleasant, unintelligent, or unlikable person, almost always a male. Primarily heard in US. The new manager is a real peckerhead. I hope he doesn't stick around here for too long. You peckerhead—I'm gonna knock your lights out!