headrush

Noun

 * 1) A sudden feeling of dizziness and/or euphoria, such as:
 * 2) orthostatic hypotension, due to low blood pressure, for example when standing up suddenly.
 * 3) nicotine rush, for example in people who seldom smoke, or when smoking on an empty stomach.
 * 4) a rush induced by mind-altering drugs.
 * 5) a rush due to emotional agitation or excitement, for example when seeing someone one is in love with.
 * 6)  Something exciting or thrilling.