All genres seem to have about a 15 year period of recycling themselves. "Scream" resurrected the horror genre, "There's Something About Mary" brought back gross jokes, and "American Pie" built on the old "Porky's" and "Animal House" model from the early 80's. What helped make it different was the serious attempts to develop drama and romance amongst the few major gags - the same thing which also hurt it as that dragged down the pace and made it a patchy comedy. "Road Trip" shirks that model and goes directly to the much more entertaining eighties one - lots of gross out jokes, some T&A (at least 5 pairs of breasts) and a cracking pace which helps keep it light and the gags flying thick and fast. Anytime it threatens to go serious for a few seconds, mostly involving something to do with Amy Smart or Paul Costanzo's storylines, it suddenly shifts to become hilarious again (eg. Boston campus scene).
Meyer does the usual quiet main role well, as does Costanzo as his pot-smoking brainiac friend, but in these kind of flicks though its the supporting characters which you remember and the same thing happens here. Of the main gang you'll most likely remember the weedy Kyle (DJ Qualls) who has some scenes with one hard to forget gal (a big congratulations to the actress for being so brave).
Seann William Scott follows up 'Stifler' with a nicer, but equally hilarious chauvenistic macho role which ends with him learning the secret of the male G-spot the hard way. The one who easily steals the show though is Tom Green who seems a little more subdued than usual, but is still just out there hilarious. What he can do with just a mouse, a snake and his mouth is worth the admission price alone.
The plot? A barely existent loose clone of the Paul Rudd/Reese Witherspoon comedy "Overnight Delivery", but that's not the point. This is more a sequence of gags, one after the other, which is the way it was designed - the plot is just there to loosely tie them together - just like the Porkys films did.
This means on subsequent viewings the gags will wear thin, and even in this first viewing one can see the last 15 minutes of the film, plot-wise that is, feels very rushed - but its an inherent problem of the genre. This is definitely a big crowd pleaser and one I urge you to see with a major youth audience - it will have you laughing hard I swear.