n. Synonyms: douchebag, blowhard, blackguard.
An annoying person who has little
common sense. A waste of space. An arrogant person who has no
talent.
The word is used repeatedly in the novel "The
Moon is a Harsh Mistress" by sci-fi master Robert A. Heinlein
A yammerhead is:
1. The obnoxious
guy sitting in the next
table over at the restaurant, calling the waitress every five minutes because his drink is too warm, he does not have enough sauce, and the steak is a tad undercooked.
2. An
idiot who objects to agreeing a proposal by unanimous consent because he wants to hear "debate," which is "essential in a democracy."
3. There is at least one in every room. If you cannot find him/her, then you are it.