If Urge Overkill's tactless braggadocio was an inside joke, no one cared enough to wait for the punch lines. When the group disbanded -- taking the numbingly predictable route of bad record deals and drug addiction -- the news barely made a blip on the pop radar. The final statement of their behind-the-music-style . . . ahem . . . overkill was singer Nash Kato's solo effort, on which he appears head-to-toe in white, the messianic vision of a bloated woulda-been. But, strangely, after a six-year hiatus, the band's amped riffing and rock-star mockups seem sweeter in this ironic age. It shouldn't have been a surprise when the group announced a reunion. But -- considering the $15 ticket price -- the joke could well be on us.