R-rated favorite Jonah Hill refrained from swearing for 58 seconds to stop by "Sesame Street" and explain the definition of the word mustache to Elmo. (Apparently Elmo's never caught an episode of "Magnum P.I." with Tom Selleck.)
Looking like an young unkempt Gene Shalit, Hill is the perfect star to demonstrate all the great things one can do with a (fake) mustache.
He even has prior experience; on “Late Night with Conan O'Brien” two years ago, he debuted the mustache tattoo on his index finger – likely angering dozens of hipsters who thought they were the only one to think of that.
Unfortunately the “Get Him to the Greek” and "Cyrus" star did not have enough time to explain “Weird Neckbeard” for the kids.