One who breaks things notoriously such as screen doors. A klutz in other words.

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)

Someone who has no balance whatsoever and can not stand up on a bus and ends up falling on everybody.