Derrick Comedy exploring every facet of a single joke over 3 minutes? Gold. For more than an hour and a half? What starts as an amazing premise quickly grows old. The clever writing and delivery of the jokes all the way through just can't bring this movie home for me.
Underneath all the vulgarity is a really good natured and sincere homage to childhood detective characters like Nate the Great and Encyclopedia Brown. If you like Dino Stamatopolous' puerile spins on nostalgic themes I think there's little about this not to dig.
I rarely watch comedies (I get enough humor out of straight-faced action flicks) but even I have to admit this is a damn funny movie. An earnest send-up of junior detective squads like the Hardy Boys, with an endlessly quotable script ("I don't know, Jason. According to his shirt, he has 'no fear.'") and an appearance by indie darling Aubrey Plaza. Has a similar vibe to the 90's comedies I grew up with.