“Dirty Grandpa” is vulgar and all of its comedy was based on inappropriate innuendos.

I give this motion picture zero out of five stars.

As a movie fanatic, I did not find one thing to enjoy in this movie.

It had no true humor. The movie relied on vulgar jokes and typical 21st century comedy that is just too overused.

Robert De Niro starred in the movie with Zac Efron.

I was disappointed that De Niro would play in such a terrible, degrading movie. De Niro must have been desperate to have played in a such a pointless film.

Usually every film he is in is worth the watch, so it is unlike the actor to lower himself to such a raunchy movie.

De Niro plays Dick Kelly, a crude, vulgar grandfather, who tries to be young again.

Efron plays an uptight laywer, Jason Kelly, who is about to get married. One can assume Efron is apt to act in these useless comedies as he did in “The Neighbors” (2014) .

Efron acted senselessly and had no true acting skill in this movie.

There was no central plot or story line, just foolish shenanigans pulled off by the actors.

Things go downhill when Dick, a recent widower, takes Jason to Daytona Beach to party. Jason’s marriage is on the line as he gets deeper and deeper into his grandfather’s schemes.

De Niro’s Oscar-winning talent is wasted on raunchy humor and crude jokes in this “comedy.”

I will never get back the time I wasted watching what Hollywood says is a movie.

The three minutes I left to go to the restroom was by far my favorite part of the entire movie.

This movie is R-rated, but it should not even be rated because this should not be a film.