Silly as a drag queen convention and subtle as an unflushed toilet, “Blades of Glory” is everything you’d hope for in a Will Ferrell comedy.

And more.

This farce, set up to mock its way through the figure skating universe, is Ferrell excess at its finest. Paired up with Jon Heder, who adds some snarky, effeminate edge to his wholesome “Napoleon Dynamite” guise, Ferrell cuts loose as a blast of flab, flatulence and unadulterated testosterone in a sport not known for any of those.

Heder plays Jimmy McElroy, the sissy-king of skating, all flamboyant costumes and “American Idol”-sappy routines. Think Clay Aiken on ice.

Ferrell is his crotch-grabbing, smack-talking dope of an arch-rival, Chazz Michael Michaels, a “tsunami of swagger,” a sex-addict Elvis-wannabe with the hair to match.

“Hope you brought your silver polish, McElroy. I smell gooooooold!”

Their feud spills over onto the medal stand at an event that must-be-but-cannot-be-named-the-Olympics, and the bloody brawl gets them both banned from the sport.

Three and a half years later, Chazz is on a bender, skating for some obnoxious capade or other (vomiting in his wizard fake-head costume, no less). Jimmy’s selling skates. But Jimmy’s gay stalker (Nick Swardson, hilarious) finds a loophole in their ban. They can’t compete – as singles. And there’s no gender ban in pairs. What if …

“Blades of Glory” loses a bit of steam as the guys train for that Winter Sport Games comeback, and Chazz helps Jimmy court the cute kid sister of their big pairs rivals, the faux-Christian/incestuous Van Waldenbergs (Amy Poehler and Will Arnett, way over the top).

And of course we finish with “the big game,” or skate off in a not-the-Olympics in Montreal.

But the details, the simple meanness of the piece, is a hoot. Real skaters, from Nancy Kerrigan to Brian Boitano, have cameos. There are deliriously goofy “Up Close and Personal” mini-biographies of the competitors, and Jim Lampley and Scott Hamilton pull out all the stops (Lampley, especially) as the color-commentators for the big events.

“This guy puts the bone in Zamboni!”

As a dopey dude’s view of a female-viewer-friendly-sport, “Blades” does its share of fey-bashing, if not actually gay-bashing. The back-stabbing, cutthroat competition of figure skating has been in other movies, but never has it gone this far over the top. Ferrell’s riffs on skaters he’s sexed up will make you – and Oksana Baiul – blush.

A couple of TV commercial directors shot this (many, many hands on the script), and they keep it brisk, with decent stunt work and digitally altered skating to make the on-ice laughs work. Ferrell and Heder keep it funny. Mostly.

Let’s just say they picked the right routine, land just enough triple toe loops, but don’t exactly stick that triple axel in the finale