The phrase "initial euphoria" refers to a temporary feeling of extreme happiness or excitement at the beginning of something new or positive. Full definition
The film itself isn't based on the murder, rather the pair's initial euphoria of their act followed by Philip's fear of being caught, and Brandon's conviction that they won't be caught. (futuremovies.co.uk)
But the GDP growth recovery is likely to be moderate, creating risks of some pullback in the Japanese equity market as initial euphoria about new stimulus measures erodes,» he said. (cnbc.com)
The beatnik characterizations feel outdated in the time of peace - and - love hippies, and the leads» initial euphoria quickly fades to a bland, status - quo conformity that isn't consistent with the infection's established pathology. (rottentomatoes.com)