An upside down crucifix. That's the ticket.
"Recently, however, it is common for the
upside-down cross to be used as a symbol of atheism, humanism, and the
occult. Several black metal bands use an inverted cross to call
attention to their supposed devotion to Satan. Upside-down crosses
appear in horror movies such as The Omen and The Conjuring
as a signal of demonic activity. The symbol crops up in tattoos, on
pendants, and as a logo on t-shirts. Sometimes, it is accompanied by
statements such as “Believe in Yourself,” “There Is No God,” “Black
Mass,” or “Not Transformed.” In these contexts, the obvious intent of
the inverted cross is to declare an opposition to Christianity. Turning
the cross upside down becomes a means of denying the truth of Christ and
mocking His sacrifice.
So, what is the meaning of an upside-down cross? It depends on the
context. When the symbol is used in a church setting, it is most likely a
reference to Peter and the manner of his death. In other contexts the
inverted cross is often an anti-Christian symbol. In our fallen world,
holiness is often mocked and what is good and pure is twisted by the
“god of this age” (2 Corinthians 4:4). " Google result for upside down crucifix.