verb (used with object) Informal.
Examples from the Web for underwhelming
The last film most people probably remember of his was the underwhelming sexagenarian comedy Secondhand Lions back in 2003.
But, his psychic performance in the British Empire was about as underwhelming as England's in the World Cup.The Amazing Tale of Paul the Psychic Octopus: Germany’s World Cup Soothsayer|Emily Shire|July 12, 2014|DAILY BEAST
Then, the typically good-natured crowd seethed with anger when West appeared hours late and then delivered an underwhelming set.Kanye Returns to Bonnaroo With a Night of Lectures|Daniel G. Hill|June 15, 2014|DAILY BEAST
Instead, we see Vanessa hit on Louie over and over again, with underwhelming results.
Why should someone pay $9.99 for, say, the underwhelming Led Zeppelin III just to hear “Immigrant Song?”From Bieber to the Beatles, How the iTunes Store Brooklynized Music|Justin Moyer|May 5, 2013|DAILY BEAST