A comedy trilogy refers to a collection of three humorous movies or stories that are connected in some way. They often follow the adventures of the same main characters and contain similar themes or styles of humor. Full definition
Sam Rami's «The Evil Dead» truly is one of the greatest horror / comedy trilogies of all time... each film brings something (metacritic.com)
Mike Myers starred as the womanizing, sixties time traveler in the Jay Roach - directed comedy trilogy (1997, 1999, and 2002), which amassed $ 676.4 M at the box office. (dailymail.co.uk)
The idea of «obviously» envisioning a comedy as part of a trilogy is a little bizarre, since there are very, very few examples of successful comedy trilogies and there's nothing in the original Hangover that looks like they're really setting things up for a sequel (cinemablend.com)