Whooshka: euphemism# that describes the sudden sharp rise in a...

Whooshka: euphemism# that describes the sudden sharp rise in a stock's share price*; a term commonly used by an egotistical holder in said stock, after the fact. alternatively it may also apply to the rapid deflating in SP, not dissimilar to the sound of air rushing out of a punctured balloon(!)

#See also: 'Toot toot, the train is leaving the station'

* an event that is becoming rarer these days
(!) an event that is becoming more common these days