<p>Megan Mullally, who played the narcissistic, perpetually condescending Karen Walker on “Will and Grace,” can make reciting the alphabet funny.</p><p>In fact, at one point she does just that in “Iceboy,” the absurd new musical comedy — emphasis on absurd and comedy — receiving its world premiere at the Goodman.</p><p>Here, Mullally portrays Vera Vimm, a narcissistic, perpetually condescending 1930s Broadway diva who at the start buys a pre-historic caveman encased in a block of ice. That caveman then thaws and becomes a star. Just go with it!</p><div class="RatingCard Enhancement" data-module data-rating="3.0" data-align-center> <div class="RatingCard-title"> “Iceboy!