Fenn laughed what novelists are fond of calling a mirthless laugh.
Frank Rich of the New York Times called the comedian's performance "mirthless"
It was not boisterous; indeed, it was consciously refined, -- mirthless, meaningless.
Often, during the last few days, he had told himself, with a kind of mirthless chuckle, that _he_ was not going to be
(Christian Slater, John Cleese, Steve Buscemi, Jay Leno, Arsenio Hall), but this time around the script and animation have resulted in a "mirthless," "underimagined" and "strenuously unfunny" movie, according to Variety.