A person who tells a joke that they think is funny, but actually is not funny. In essence, they have missed the mark and metaphorically "punched the coat" instead.

Coat Puncher has been popularized by the dot-com website bearing the same name.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)