Correct spelling for the English word "whoosy" is [wˈuːsi], [wˈuːsi], [w_ˈuː_s_i] (IPA phonetic alphabet).
The word "whoosy" appears to be a slang term with a less certain etymology. It is commonly used to describe a feeling of dizziness or disorientation, often associated with an intoxicating substance. However, since it is an informal and colloquial term, its specific origin is unclear. It is possible that "whoosy" derived from a variation or alteration of other words, but there is no widely accepted etymology for it.