If you’re into comedies where most of the jokes are attacks on Zac Efron’s masculinity then Dirty Grandpa is the movie for you.

Quick plot rundown, Efron plays Jason who has to escort his grandpa Dick, played by Robert De Niro, to a vacation in Florida.

Jason is a lawyer about to be married to his trophy wife fiancee, Meredith. Dick’s wife just died after a decade long fight with cancer.

The one thing on Dick’s mind after being faithful to his wife through ten years of serious illness is, you guessed it, having sex. (Really subtle naming of that character…)

Jason is forced into a wingman position as his grandpa tries to get in bed with a college girl.

Along the way Jason realizes his fiancee is a horrible person and he rediscovers his love of photography.

So the plot is pretty much what you’d expect if you saw the trailer. Shockingly the plot follows Campbell’s Hero’s Journey almost exactly but the doesn’t save the movie from the abyss it falls into.

What about the basic ingredients of comedy? The jokes and the laughs?

There isn’t much.

There are a lot of insults lobbed at Jason as he is the straight man. Most of those fall flat.

Dick’s physical abuse of Jason becomes a running joke. Why the writers thought that was funny enough to make a repeated joke, I don’t know. There’s no slapstick to it. It’s just a grandfather attacking his grandson because he thinks it’s funny.

The funniest moments centered on the unashamed lust shared between Dick and the college girl, Lenore, played by Aubrey Plaza. Everything else was pretty much just vulgarity masquerading as humor.

When I don’t like a movie I try to think who would like it. That’s a hard task with Dirty Grandpa. I’m a fan of South Park which is about as vulgar as it gets and I still hated this movie.

So should you see it? Absolutely not. Too much disgusting nudity, not enough real jokes, and stilted character development makes this one of the worst movies I’ve seen. If you’re going to the theaters see something else instead.

-GoCorral