Zac Efron Is Half-Naked And Hilarious In Explicit Red Band Neighbors Trailer! Watch HERE!

What happens when a fraternity moves next door to mild-mannered new parents? Oh, who cares?? It’s Zac Efron shirtless! A lot!

And he’s funny too! Boi is holding his own against new Neighbors Seth Rogen and Bridesmaids funny girl Rose Byrne!

And did we mention he’s shirtless??

Ch-ch-check out the video (above) to see Zefron stay the strong silent type as Seth sells the the flick!

Then watch the NSFW red band trailer …AFTER THE JUMP!!!

[Video via Instagram.]