halfcock

from The Century Dictionary.

• noun The position of the cock or hammer of a gun when it is elevated only half-way and retained by the first notch. See cock.
• To cock the hammer of, as a gun, so that it rests at the first notch.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To set the cock of (a firearm) at the first notch.
• transitive verb [Colloq. or Low] To do or say something without due thought or care.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun confusion resulting from lack of preparation