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1.
A question whose answer one fears to seek.

Etymology: Rick Santorum used to have a mustache. It would be funny to see a picture of this. But there's no way you're searching for "Santorum's Mustache" on the Internet.
"Um, are you sure that hooker was really a woman?"

"Santorum's Mustache, man."
by Black Passion February 02, 2012
 
2.
The act of felching Santorum from your lovers anus, then drawing a Mustache with the felching straw dripings you have not consumed.
Mitt gave Rick a Santorum's mustache with his crazy straw after reached the end of his felching session.
by Dickless Santorum March 14, 2012