(idiomatic) A situation in which a person is taken advantage of or treated unfairly; a situation in which a person is led to expect something, but receives nothing or much less than expected.

To change or exchange repeatedly. / To rearrange, reconfigure, or customise.

(informal) A disc-shaped unidentified flying object or UFO; originally in reference to sightings by aviator Kenneth Arnold in Washington in 1947.

(pathology) A lung disease caused by a fungus, Histoplasma capsulatum, often asymptomatic otherwise with symptoms similar to those of flu.