Vulgar comedy seems to be a successful ingredient to many a film lately, “Superbad” being the most outrageous example. The Farrelly brothers have included this seasoning by the truckload in their latest project, “Heartbreak Kid,” which is just about their best work yet.

You set a pretty clear tone when an opening line from 80-something Jerry Stiller involves asking his son – both in real-life and in the movie – Ben Stiller if he’s been “crushing any pussy lately.” Thankfully, this isn’t where the film peaks as “Heartbreak Kid” delivers scene after scene of near shocking, sometimes-uncomfortable humor. Equally surprising is that the Farrelly brothers have created an immediately funny film that actually works.

Ben Stiller plays Eddie, a perpetually single, 40-something-year-old sports equipment storeowner. Not having found the right girl yet, Eddie hangs out with his outspoken father, Doc (Jerry Stiller), and his whipped friend Mac (Rob Corddry, “Daily Show” alum).

It’s pretty clear things need to be shaken up when your dad asks you to go to Vegas to “tag team a couple of broads.” So in this convenient fashion, Eddie happens across impossibly hot Lila (Malin Akerman) during a mid-day purse snatching, resulting in Eddie getting spritzed in the eyes with perfume. Thus begins the two’s comical courtship and fast track to marriage. Unfortunately, Lila is sort of a like a Mogwai, turning into a matrimonial Gremlin right after the ceremony, divulging such eye-openers as her deviated septum, her “kitty ring,” and her penchant towards complex sexual positions, all having bawdy names.

So much of the film’s humor revolves around the lines and shocking scenarios between Lila and Eddie. It’s no surprise, then, that the film almost shifts into a flat, coasting neutral when Eddie meets Miranda (Michelle Monaghan). Given his Jekyll and Hyde spouse, Eddie is now susceptible to the most bland, genuine of female prospects.

The time spent on Eddie and Miranda’s friendly sneaking around – on Eddie’s honeymoon no less – is just long enough. While surely a romantic comedy, the Farrelly brothers have effectively proportioned both variables, creating such raucous humor that sustains you through the more mushy moments. The balance is easily digestible and nowhere near as tedious as other films of this genre.

But speaking of genre, “Heartbreak Kid” really does take the comedy of this category to a new, cruder level. One scene in particular near the end of the film is just plain hysterical, rivaling a similar startling scene at about the same timestamp in “Waiting.” All you can do is hold your hand over your mouth in shock and laugh your ass off.

There’s been talk that the film actually has a few “alternate endings” if you stay through the credits. To be sure, they’re really just additional, funny scenes that are certainly worth the short wait. However, hearing of such a tactic before actually seeing the film smelled of a director’s weak attempt to possibly right some wrongs earlier in the movie – if they can’t close it right the first time around, they’ll try again with a different take.

Thankfully, the Farrelly brothers make no such attempt, and don’t need to. Being a romantic comedy, “Heartbreak Kid” certainly does end on an expected note (with a cameo from Eva Longoria, no less). However, the whole of the film is certainly something unexpected, especially from the directors of “Shallow Hal” and “Stuck on You.” It’s nice to see the brothers have grown up, certainly not in their comedy, but at least in their delivery of a truly funny movie.