suffer a serious slump / take a sharp drop

crumbling / unraveling / (of the way in which a door or other similar object is constructed) in a ramshackle manner / (of the way in which a door or other similar object is constructed) in a shaky manner / (of the way in which a door or other similar object is constructed) in a slack manner

become ramshackle / come loose / be wobbly / become unhinged / get rickety / get out of order / become unstable

work poorly / slacken / be unstable / loosen / be on shaky legs

lose heart / feel let down / be disappointed / be discouraged / feel deflated / be disheartened

school hygiene

lunar eclipse at moon rise / lunar eclipse at moon setting

be sturdy in build / be well-built / be stoutly built

be shrewd / be cunning / be manipulative / be canny

economize / save money / be tight-fisted / be close-fisted / be a cheapskate / save expenses