A pederast stache refers to
creepy moustaches often worn by pederasts. Now, it is important to make a distinction here: Pederasty refers to actual, physical relations of a sexual nature between a grown man and an adolescent boy. Pedophilia simply refers to love of adolescent children. Getting a mental picture? Good.
While somebody
may have a pederast (super fucking creepy) stache, that doesn't necessarily
mean they are a pederast, but the chances of them being a pederast
may be a little higher.